Airline reservation system project database design jobs

...automating online processes. My project centers around designing a purchase system for sports event tickets, capable of: - Automatically purchasing tickets from a specified platform, - Selecting tickets based on specific criteria: price, seating section and event date. The final product needs to function seamlessly and efficiently, minimizing manual input, making the ticket buying process quick and easy. Ideal candidates for this task will possess excellent Python scripting skills, webpage automation experience and a functional understanding of ticket purchasing platforms. Any previous experience in automating similar processes would be greatly beneficial. If you're the kind of freelancer who loves solving problems with clean automation, this project is...

Timeline: 1 month including testing & installation Please propose me what technology or programming language will you use. Bid will be ignored without the proposal. Backend 1. Login per branch 2. Login per counter for each branch 3. All data is branch specific which will NOT share to other branch, (Branch A can view it's own account & customer data only, cannot view Branch B data) 5. Manage the bank account per branch for maintaining the total cash/available cash/total loan from customer/pending rebate interest 6. Manage the customer account for maintaining available cash/locked cash/outstanding loan/rebate interest 7. Manage the customer transaction with deposit/withdrawal/investment record 8. Automatically send out the branch account summary & report of Bra...

I'm seeking a developer to build a highly functional employee management system specifically tailored for performance evaluation. This system should incorporate distinctive functionalities including self-evaluation, peer-review, and objective-based assessment. The platform's performance evaluation feature should have the capacity to monitor various metrics such as attendance, goal achievement, and skills development. Ideal skills for this job would be proficiency in system development, demonstrable experience in creating similar platforms, and a deep understanding of HR systems or performance management systems.

As an organization, I'm looking for a digital solution to streamline some of our daily operations. The focus of this project will be on automating data sending and receiving of staff scheduling tasks. Key Tasks: - Develop a module to automate data collection, particularly focusing on schedule data. This feature should be capable of gathering, organizing, and storing the information in a user-friendly manner and sending data back to the system. Ideal Skills: Python Automation The freelancer should have experience in system automation, especially in handling data collection and schedule management. Proficiency in developing user-friendly interfaces and a sound understanding of scheduling algorithms would be a big plus.

You need to collect a vast array of information on Wellness events in the upcoming four months (April till May) in Sydney For this project, your precision, attention to detail, and research skills will be of utmost importance. Key Responsibilities: - finding the events from various sources. Your team is to build a database of all the events. - Collect fields like data source, event name, location, event date, event time, link, description, ticket price, ticket link - Accumulating organizer details and contact information. Ideal Skills: Data compilation, research skills, attention to detail, understanding of the wellness industry, proficiency in English. Prior track record for doing the research is important.

write in python, no GUI need. Read from POS (example, square POS, clover Pos) API for the products/items. Read about: product name, barcode, price, discount price (if any), discount method (example, 10% off or buy one get one free), discount duration, etc. Per product per row. write to a database, barcode as index. And only write the discount price based on the discount duration. Code can be based on Square POS sandbox. or Clover sandbox.

I urgently need an expert coder well-versed with Database Management System. The specific DBMS that will be used is not specified yet, so the ideal freelancer will be someone comfortable working with multiple types including MySQL, Oracle, SQL Server, PostgreSQL, MongoDB etc. Key requirements: - Extensive knowledge and experience in various Database Management Systems - Flexibility and adaptability to any DBMS - Ability to deliver high-quality work on a urgent timeline This project has a high level of priority, so I need someone who can start working immediately. I'm looking for a freelancer who can communicate effectively and complete the project ASAP. Your expertise in navigating different DBMS will be a significant factor in accomplishing this ...

...expert in database management for the development of a unique software solution. Although we'd initially considered additional functionalities such as data entry, analysis, and reporting, we'll now be zeroing in predominantly on the development of an efficient, robust database management system. Key Responsibilities: - Design & Implement a Comprehensive Database Management System. Skills & Experience Required: - Extensive knowledge and experience in Database Management. - Any additional understanding and experience with various programming languages and software testing will be considered an added advantage. Freelancers interested in this project should clearly state their experience in their applications. Pa...

...distinct specifications for this project are outlined below: - The gallery should pull product images from an SQL database. Robust SQL skills are therefore essential. - The images should be organized and displayed in chronological order, determined by the date. Proficiency in coding for complex sorting algorithms is a must-have for potential freelancers. - The gallery must include a zoom-in function on each image to allow viewers a more detailed view of each product. Agile proficiency in Javascript or other relevant languages for this functionality is crucial. In order for smooth collaboration, excellent communication skills are desired. Extensive experience in SQL, JavaScript, and advanced sorting algorithms will be favorably looked upon. This project requires ...

I am looking for an experienced animator who can design a simple yet informative graphical motion video. The video should effectively illustrate how partitioning works within the Linux operating system. Though the project is directed towards an audience with basic knowledge of Linux systems, it must be clear enough for even a novice to understand. To fully represent the concept within the video, the scope will be limited to the partitioning aspect of Linux file system. The successful freelancer for this project should have: - Strong skills in animation, preferably a background in educational content. - A solid understanding of Linux systems, particularly the concept of partitioning. - Ability to communicate complex tech concepts in a simple and engagi...

I am looking for an experienced and innovative developer or team to build an AI-powered hotel system featuring facial recognition and detection. Key features of the system should include: - Facial recognition enabling door access control. - Facial detection for tracking other hotel-related activities. - A manual invoice generation system to transfer the cost of hotel activities, like door access times and room service orders, to the client's account. - Integration with Python, PHP, and JavaScript. This project requires a high level of expertise in AI, machine learning, facial recognition technology, Python, PHP and JavaScript, as well as a deep understanding of invoice generation systems. Thus, experience in these areas is highly desirable. The successfu...

I'm seeking a skilled developer who can design an all-inclusive cashier system for food trucks featuring various payment and customer loyalty program options, and sales tracking capabilities. Key System Features: 1. Payment Options: The system should support multiple payment methods including Cash, Credit Card, and Mobile Wallet. 2. Loyalty Program: I'd like to implement a loyalty program that includes a Points-based rewards system and offers Exclusive deals to customers. 3. Sales Tracking & Reporting: Following each shift, I want the system to generate a report detailing sales and order tracking. If you have the necessary skills and experience – especially with similar point-of-sale systems or restaurant management softwar...

I'm seeking an expert in power electronics simulation, specifically in control system simulation and PI controllers. Ideal skills and experience for this role include: - Demonstrated experience in power electronics and control system simulation - Proficiency in implementing and tuning controllers - Ability to explore, and potentially enhance different elements of the controller simulation - Capacity to work independently and problem-solve effectively

I'm seeking an individual or team with embedded systems hardware design and networking setup experience. This project could potentially span both areas, so versatile candidates are preferred. Skills & Experience: - Comprehensive understanding of embedded system hardware design - Proven network setup and configuration abilities - Knowledge of embedded software development is not required but beneficial Remember, this project's complexity is simple, and I believe it won't be challenging for experienced freelancers. Ideally, applications should include details of your past work and experiences. I appreciate the effort taken to draft a detailed project proposal too. Your understanding and enthusiasm for the task at hand are crucial in...

In need of a professional to design and implement a Power Automate flow for auto-generating and sending reminder statements to my firm's clients, based on the information provided via a spreadsheet. Key Project Elements: - Developing a tailored email reminder system to ensure timely payment from clients. - Utilizing input data from a detailed spreadsheet. This includes specifics such as customer names, owed amounts, invoice numbers, and other necessary details. - Configuring the platform to dispatch the statements through email. Expectations: - Detailed understanding of Power Automate is essential, previous experience with similar projects would be a plus. - Familiarity with spreadsheet parsing would be beneficial. - Superior attention to detail, assurin...

**Title: Data Analysis of Airline Ticket Pricing Based on Supply and Demand** **1. Introduction** - Overview of the project - Importance of understanding supply and demand in airline ticket pricing - Objectives of the project **2. Data Collection** - Source of data: Obtain historical data on airline ticket prices, flight schedules, passenger bookings, and other relevant variables. - Data format: Ensure the data is structured and organized for analysis. - Timeframe: Collect data spanning several months or years to capture seasonal variations and long-term trends. **3. Data Preprocessing** - Data cleaning: Remove duplicates, handle missing values, and correct any errors in the data. - Data integration: Merge datasets from differen...

I need an experienced professional to develop a toll pricing model system that will be efficient in optimizing traffic flow and reducing carbon emissions. This advanced system should: - Feature real-time traffic monitoring with an algorithm for toll revision. - Be integrated with PTV Vissim to accurately depict the effects of toll adjustments on traffic flow. - Include time-based variable or step tolls for flexibility. Ideal Skills and Experience: - Proficiency in traffic modelling software, especially PTV Vissim. - Knowledge of traffic algorithms. - Experience with systems related to toll collection or traffic management. Toll Revision Algorithm: An efficient algorithm should operate based on traffic volume and dynamic pricing. The mechanism should: - Adjust toll price...

I already have a program developed in HTML, PHP, MySQL and Javascript. I would like to remove the current access system and implement an access system with facial recognition. I need a form to record users (scanning their face) and a way to connect the already registered users (scanning their face)

I'm aiming to build a comprehensive online lottery system. The key functionalities desired are: - User registration and login system - Ticket purchasing and validation features - An automated prize distribution mechanism Here's a bit more information about each requirement: - The user registration system should be straightforward, ensuring a fluid user journey. - The ticket purchasing system needs to be secure and reliable. It should accept Credit/Debit Card, PayPal, and Paytm payments. - The ticket validation process should work smoothly using either QR code scanning, ticket number entry or barcode scanning. - The prize distribution should be automated and transparent to ensure integrity and trustworthiness. Ideal Skill Set: The bes...

For...this exciting project, I am seeking help from a talented and experienced Spline and Webflow developer who can envision and build a striking interactive 3D solar system model. The model should include planets that are clickable to display a specific set of information. Since I have not determined what exactly this information should be, the developer should be flexible and ready for potential updates. For successful bids, freelancers need to showcase: - Similar 3D interactive projects they have worked on - Previous use of Spline and Webflow Prior work and hands-on experience in these areas are essential components for this project. If you think you have the right skills and experience, then I'd love to hear from you! Let's create a fascinating int...

I'm in need of a proficient developer to design a web-based rental management system geared towards tracking office equipment leases and Payments. Specific responsibilities include: - Creating a property listing feature to advertise available office equipment - Developing a tenant management module to monitor equipment usage and condition - Integrating a payment tracking functionality to keep tabs on rental fees The ideal candidate for this role should have considerable experience in web development and a solid understanding of rental management systems. Any familiarity with office equipment will be considered an advantage. I look forward to checking out your proposals.

I am in need of a proficient website designer to create an engaging website for my business. The finalized website should include sections for detailing our services and p...information. Currently, no specific color scheme or brand identity exists, so I am open to creative suggestions from your end in this area. Ideal Skills: • Extensive experience within website design • Creativity in brand identity formation and color scheme selection The website essential features should include: • A crisp and clear services page • Easily accessible contact information page • An easy-to-navigate online booking system Your portfolio that demonstrates any previous work in this area will be highly valued. I am looking forward to working with someone who can bring i...

I need a platform similar to but with a trans...photo and during acceptance of vehicle a photo will be required for all side of vehicle. Please provide cost and timeline estimates. See attached wireframe for reference. Regarding the budget for this project, I have based it on the pricing structure of , which is $200 USD per year. However, I am willing to allocate $500 USD for this project, which is equivalent to more than two years' subscription with drivvo.com. I believe this budget reflects the scope and value of the work involved. Please let me know if you are able to work within this budget. Please note that this project is about creating a web application, and only freelancers with relevant experience should bid. Attached is simple admin interface we wo...

I'm in need of a highly skilled Angular developer to upgrade two of my applications, from Angular version 8 to ...applications, from Angular version 8 to version 17. While the specific functionalities needing the upgrade were not specified, this project will likely cover most aspects of the applications. Key Skill & Experience Requirements: - Comprehensive knowledge and expertise in Angular development, particularly in versions 8 and 17. - Proven experience in upgrading applications across different Angular versions. - Strong understanding of testing and validation procedures during the upgrade process. - Attention to detail to ensure app functionalities remain intact post-upgrade. If your skills and experience match these requirements, I'd be glad to discuss the ...

...Financial Management system. Our goal is to: • Maintain the on-premise nature of the system • Enhance its integration capabilities with other software • Ensure that it supports and functions flawlessly for our size and user base. We desire a highly experienced consultant with a comprehensive understanding and excellent track record in dealing with Hyperion Financial Management systems. Essential Skills/Experience: • Proven expertise in managing and overhauling large scale Hyperion Financial Management systems • Extensive experience in integrating Hyperion with other software systems The objective is to maintain and improve the current system to meet our specific requirements, without migrating to a cloud-based solution. This is a c...

I need an existing cloud-based POS/ERP system as a tool for my team's training and auditing services. This tool must feature: * E-commerce integration * Finance & Accounting integration * Inventory management integration * HRM * CRM Ideally, your previous experiences should involve developing or customizing robust cloud-based POS/ERP systems, and you should have a deep understanding of e-commerce, finance & accounting, and inventory management processes. My team is more than 50 people strong, so the required system must be capable of supporting simultaneous usage by this number of users without compromising speed or functionality.

...our existing system by building an efficient API and microservices. Key Project Requirements: - The purpose of the API and microservices is to enhance our current system by integrating data more proficiently, creating a more seamless user experience. - Technological competence is paramount; the prospective freelancer should have extensive experience with our current technology stack, which is Java and MySQL. - I'm specifically interested in the Aggregator Microservice Design pattern, so familiarity with this pattern is crucial. This design, I believe, will optimize our data processing and response time, leading to a more streamlined system. Your contribution to the project, by rendering your skills and knowledge, will be integr...

More details: What are the main features you expect the ATS HR software system to have? Resume parsing and filtering, Applicant tracking and management, Job posting and distribution How many job openings do you anticipate managing with the ATS HR software system? Less than 50 Will the ATS HR software system be integrated with any existing HR tools or software? No

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I am an event organizer seeking to build a robust system to manage a large amount of event photos. This system should have the capability for photo uploads and utilize facial recognition/biometric technology. Key system features include: - Photo upload functionality. - User accounts, logins using facial recognition/biometric data. - The system should intelligently display only the photos that feature the logged-in participant. Critical criteria for contenders: - Freelancers should focus on submitting a thoughtful, detailed proposal. Target audience: - The platform will serve all parties involved in the event - the participants, organizers, and photographers. The ideal candidate will have significant experience in facial recognition and biometric technolog...

I'm looking for an ex...task involves creating a robust email database, a vital tool to enhance our marketing strategies. Key Responsibilities: - Developing a comprehensive database that consolidates both emails and individuals' names. This information is essential for customized communication during our campaigns. - Deliver the data in an Excel spreadsheet, a familiar and reliable tool for our team to handle the data. Skills and Experience: - Proven experience in data collection and management - Proficiency in Excel - Understanding of privacy laws and ethical practices in data collection is a plus Only serious and committed individuals should apply. Clear communication and prompt delivery are highly appreciated in our team. Looking forward to starting an...

...have added some more details to the request for better bids to happen. please watch out whether a CMS system really can deliver what is requested compared to a custom build approach. I'm seeking a skilled web developer to transform a Figma design into a responsive website intended for service ordering. The site should feature a user registration and login system, catering to different user roles including customer, administrator, and service provider. - Key Project Details: - Translation of Figma design - Responsive website build - User registration and login system Ideal skills for this job include: - Advanced Figma proficiency - Extensive experience in responsive web design - Demonstrated success in creating user-f...

I'm seeking a designer with CR80 card designing expertise and MySQL database or relevant knowledge. I'm launching a card for employees and need a professional and sleek design along with a secure database to store cardholder details. Key Responsibilities: * Create a design for PVC CR80 card inclusive of company logo, employee photo, and barcodes/QR codes. * Name, DOB, ID number, Issue date and expiry date should be on the back side of the card. * Establish a secure MySQL database to register and store cardholder details. Ideal Skills and Experience: * Proficiency in CR80 card designing and incorporating elements such as logo, photos, and barcodes. * Familiarity with MySQL database creation and maintenance. * Experience working with PVC...

I ...achieve this, I require a customized digital solution that can handle the dynamic nature of milk distribution. The ideal freelancer for this project should have: - Proven experience in developing order management and logistics systems. - Strong understanding of the dairy industry and perishable goods supply chain. - Expertise in creating user-friendly interfaces for easy order entry and modifications. - Capability to integrate real-time tracking features for deliveries. - Knowledge of database management for customer data, order history, and inventory control. - Ability to implement features for forecasting to help with planning and reducing waste. The system needs to be scalable, reliable, and easy to use, ensuring that it can grow with my business and adapt t...

...DO NOT accept this job. 02. Work life balance not for young man. Work hard when we still young 03. we only deal with business owner, if you are agency, sales manager or project manager pls do NOT accept 04. we dont mind if u are just a small team. as long as responsibility, work hard, fast respond and quality. 05. Respond message to your client even after working hour, sat or sun & public holiday 06. we only deal with team with fast respond, quality, friendly, good attitude & responsibility 07. prepare daily update in googlesheet 08. in some discussion will go by zoom & will request permission from freelancer before project start 09. reasonable new features charge and willing to accept minor features request by client even not status earlier. 10. Reply message ...

I am searching for an expert developer who can proficiently build a WinOLS API system. The core function of this system is to identify variables, denote the names of different versions, and successfully import changes to the actual file. (an API that acces to a NAS where are stored all ols files, identify variables, names of versions, and import changes to actual file..and sends to the customer..) want to make an online service with custom front-end accounts that will be using Winols tuning software database (over custom front-end) to apply features to clients uploaded files. Custom API to make it work is required. windows api and online access api About feel of usage.... customer don't want to know that its using winols therefore we need custom look enviromen...

I'...a comprehensive website for our traditional Venezuelan restaurant. The website must be available in both English and Spanish. At the moment, there is potential for featuring an online ordering system in the future, this is not an immediate requirement. However, it's crucial to obtain a well-designed layout that includes the following elements: - Our restaurant's menu - Online reservation system - Information about Locations and hours - An "About Us" page for company information - Exciting updates on our Promotions. The ideal candidate will have a strong background in website development and design, be bilingual in Spanish and English, and have experience with restaurant or similar industry websites. Familiarity with creating on...

...specialisation in solar battery power systems (eg: AC/DC Inverter, LifePo4 storage). This project centres around the design, planning, and building of power generation/ storage systems inside trolley/ tool boxes. Skills and experience you should ideally possess: - Expertise in designing and developing portable energy systems - Understanding of the latest power generation equiment and optimisation - Experience on energy management, storage and power electronic technologies. Project deliverables include schematic designs, system layouts, and a comprehensive implementation plan for this renewable energy-based portable power station unit. If you have the necessary skills and experience to design and make this system, please feel free to place ...

We intend to set up a water management and automatic irrigation system for residential and commercial properties. The entire system will include sensors for water level, flows, quality, environmental readings like rainfall, wind, solar radiation as well as some soil sensors. The system controls water pumps, control valves and solenoid valves. Core will be an extensible IO module controlled via modbus. A first pilot will consist of roughly 40 sensors and 50 outputs. While the software side of the project is covered, we are in need of someone to assist us on the hardware side. Skills & Experience: - In-depth knowledge of sensors - Familiarity with selection criteria for sensors - Experience in Modbus IO systems - A good understanding of the principles beh...

# Brief for Developers: Automated Article Creation and Posting System for WordPress **Objective:** Develop an autoblogging system utilizing OpenAI's ChatGPT to automate article creation and posting on a WordPress site running the Divi theme. This system aims to generate high-quality, targeted articles in bulk with minimal manual intervention. #### **Key Features and Requirements:** 1. **Article Generation Process:** * Utilize a fixed sequence of prompts with ChatGPT to create articles. * Support for analyzing 1 - 5 URLs as input for content generation. * Language specification and keyword phrases must be predefined for each run. * Capability to generate and import 20 - 50 articles at a time into WordPress as posts, maintaining high-quality fo...

I'm looking for an experienced professional to install my polyethylene above ground water tank in my yard for rainwater harvesting and a pump system to use it as emergency house water. My house is located in Huai Yai, Chonburi, Thailand As part of this job, you'll need to: - Survey the area and propose a suitable installation method - Source the right pump and plumbing for the project - Complete the installation, making sure the tank is secure and positioned for optimal rainwater harvest The ideal person for this job should have: - Experience with similar installations - Knowledge about rainwater harvesting systems and best practices - Ability to work in Huai Yai Please include details of your relevant experience and any other information that could help me un...

...to create a comprehensive classroom management database. This platform aims to improve the general flow in the classroom, record classwork and homework, and monitor attendance. Furthermore, these data are expected to be compiled into a simplified report format for evaluation. Key Features: • Compatible with both Windows and Mac operating systems. • Ability to generate student reports. • Provide a channel for classroom communications. • Graph progress • Generate alert notifications based on specified indicators. Integrate barcode scanning to access student entry/profile quickly Notifications Requirement: • All system notifications should be configured to be sent via email. Ideal Skills and Experience: • ...

<Overview> Please collect product information on vehicles or service information that have or will have the technologies described in the “Technology Description” section below. <Technology Description> This technology calculates a load degree indicating a degree of a load that acts on a vehicle on a traveling route of the vehicle, and set a usage fee to lower price when the load degree is high than when the load degree is low. Please search for this technology in this contest. <<NOTICE>> The target car brands in this search are limited to US, European, Chinese, and South Korean brands. <Requirements for Payment> ・Submit documentary evidence that clearly states the details of the subject product, the name of the company selling the product, and...

...a Windows-compatible Stock Management System. The software should include: - Real-time stock updates: I need to know instantly when changes to stock levels happen. My business moves quickly, and my software solution should keep up. - Reporting and analytics: Raw data is good, but I need to be able to interpret it easily. I need the software to pull together statistics and provide me with clear, simple, actionable reports. Ideal skills and experience for the job include: - A strong background in developing Windows software. - Solid understanding and experience in inventory management systems. - Proven experience in implementing real-time updates functionality. - Experience in developing reporting and analytics tools. Please note that this project does not require any ...

I'm in need of an experienced Red Team to carry out an exhaustive assessment with three key objectives: * Identifying vulnerabili...is our internal network, and we're specifically targeting it for a thorough examination. Upon completion of the task, I require two types of reporting including: * An executive summary, outlining the key findings in a clear and succinct manner for high-level stakeholders * A detailed technical report, explaining in-depth findings, suitable for our IT department Ideal candidates for this project will have extensive experience in Red Team assessments with a focus on internal network security inspection. Your professional acuity in practical problem-solving, technical security controls, vulnerability identification, and proficient report ...

I urgently need an engineer who can design both the hard and software required for establishing time synchronization between Lidar, Camera, and GPS data. This project will serve to optimize object detection accuracy, enhance on-the-fly video analysis, and improve our depth perception abilities. Ideal skills required for this job would be: - A strong knowledge of Lidar and Camera systems - Experience with time-based data synchronization - Proficiency in both hardware and software design - A proven ability to meet tight deadlines Time is of the essence for this job, and I'm looking for someone who can prioritize this project and complete it ASAP. I look forward to seeing your portfolios and proposals.

I'm looking for a specialist in constructing a DMS software system for my home appliance distribution company. I prefer it to be built using either Odoo or a no-code platform based on the functionalities I have in mind: * Order tracking: I want to be able to monitor order progress, including sales team activities and distribution logistics. * Sales Performance and Distribution Tracking: I'd like to oversee performance metrics of the sales team, and manage distribution activities effectively. * Forecasting Capabilities: The software should allow me to project future sales and distribution patterns. * No-Code Customization: I have a preference for a no-code system for easy customization. * CRM Integration: Some CRM usage is necessary for customer informati...

I am looking for an experienced developer to create a system that automatically sends notifications to my travel agency's clients via email and WhatsApp. The notifications should include: - Check-in notices - Travel information - Offers and promotions - Thank you messages for purchasing a ticket with Ismaletur - Invitations to follow and share our social media on Instagram: @ismaletur - Flight departure and arrival schedules - Start and end times for check-in - Hand luggage or checked baggage details - Support for any flight issues Ideally, you would have experience in developing automated messaging systems, a good understanding of travel agency operations, and proficiency in integrating WhatsApp and Email platforms. The project will need to be completed within a month...

I'm looking for a specialist in constructing a DMS software system for my home appliance distribution company. I prefer it to be built using either Odoo or a no-code platform based on the functionalities I have in mind: * Order tracking: I want to be able to monitor order progress, including sales team activities and distribution logistics. * Sales Performance and Distribution Tracking: I'd like to oversee performance metrics of the sales team, and manage distribution activities effectively. * Forecasting Capabilities: The software should allow me to project future sales and distribution patterns. * No-Code Customization: I have a preference for a no-code system for easy customization. * CRM Integration: Some CRM usage is necessary for customer...

I have an RHEL 8 Linux local server (vm) I want to install postgresql ,pgadmin4 and postgis extension on it