SQL, or Structured Query Language, is a commonly used programming language for managing data in relational databases. A SQL Developer helps with the design, development and maintenance of databases. They ensure that the databases work correctly and efficiently and can also create testing procedures. With the help of a SQL Developer, clients are able to get an efficient system for managing their company data. By developing secure and reliable databases, businesses can maximize their potential and streamline all processes.

Here's some projects that our expert SQL Developers made real:

  • Improving query speed and accuracy on large datasets
  • Implementing views and stored procedures for quick retrieval of data
  • Designing database tables to store all types of data
  • Automating processes to reduce manual work while working with databases
  • Creating an efficient search function using complex SQL queries
  • Providing insights into data by creating analytical models

SQL is an invaluable tool for businesses today in managing their data efficiently. Our experienced SQL Developers help clients by developing a secure and reliable database that meets their needs. With the help of a SQL Developer, clients can ensure that their database systems work correctly and with maximum efficiency.

If you're looking for an expert SQL Developer to create efficient databases or enhance your existing systems, here at Freelancer.com you will find the perfect contractors for the task. Our wide network of talents has put together many successful SQL projects for satisfied customers around the world today. So if you're ready to take your business to the next level, post your project now on Freelancer.com and hire an expert SQL Developer to work with you on this journey!

From 298,780 reviews, clients rate our SQL Developers 4.9 out of 5 stars.
Hire SQL Developers

SQL, or Structured Query Language, is a commonly used programming language for managing data in relational databases. A SQL Developer helps with the design, development and maintenance of databases. They ensure that the databases work correctly and efficiently and can also create testing procedures. With the help of a SQL Developer, clients are able to get an efficient system for managing their company data. By developing secure and reliable databases, businesses can maximize their potential and streamline all processes.

Here's some projects that our expert SQL Developers made real:

  • Improving query speed and accuracy on large datasets
  • Implementing views and stored procedures for quick retrieval of data
  • Designing database tables to store all types of data
  • Automating processes to reduce manual work while working with databases
  • Creating an efficient search function using complex SQL queries
  • Providing insights into data by creating analytical models

SQL is an invaluable tool for businesses today in managing their data efficiently. Our experienced SQL Developers help clients by developing a secure and reliable database that meets their needs. With the help of a SQL Developer, clients can ensure that their database systems work correctly and with maximum efficiency.

If you're looking for an expert SQL Developer to create efficient databases or enhance your existing systems, here at Freelancer.com you will find the perfect contractors for the task. Our wide network of talents has put together many successful SQL projects for satisfied customers around the world today. So if you're ready to take your business to the next level, post your project now on Freelancer.com and hire an expert SQL Developer to work with you on this journey!

From 298,780 reviews, clients rate our SQL Developers 4.9 out of 5 stars.
Hire SQL Developers

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    I need an experienced SAP ABAP consultant who can step in quickly to refine, troubleshoot, and extend our existing reports and forms. Most of the work centres on classical & ALV reports plus SmartForms (occasionally Adobe Forms), so you should be confident moving between selection-screen logic, performance-tuned SQL, and layout adjustments for print output. Typical tasks include correcting data discrepancies, adding new fields or calculations, improving runtime, and aligning form layouts with brand guidelines. You will work in an ECC environment with transport access provided; I handle functional specs and test cases, so you can focus on clean, efficient code and proper documentation. Please message me with a brief outline of similar projects you have completed, your preferred develo...

    $5 / hr Average bid
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    7 bids

    I’m looking for a polished, manager-friendly dashboard built in Power BI that can pull live data from both Excel workbooks and a SQL database (MySQL). The core visuals should spotlight two KPI groups—sales performance and customer engagement—making it easy for our managers to spot trends, drill into problem areas, and download insights for their weekly presentations. Here’s what I need: • Connection setup to the designated Excel folders and the MySQL instance, with refresh schedules documented. • Intuitive report pages that compare current numbers against targets, highlight YoY growth, and surface engagement ratios at a glance. • Clean slicers for region, product line, and date so managers can self-serve insights without extra training. • ...

    $5 / hr Average bid
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    17 bids

    My goal is to turn a manual Google Sheet into a fully self-updating workspace. The sheet must pull fresh data automatically and place it in the correct tabs without my intervention. The data sources in scope are: • REST/JSON APIs • Web pages that need light scraping • A small internal SQL/MySQL database Whether you prefer Google Apps Script, AppSheet, or a hybrid approach, the final build should remain lightweight and easy for non-technical teammates to adjust. Key expectations 1. Time- or event-driven triggers that fetch, parse, and write data into designated ranges. 2. Well-commented code plus a concise setup guide so I can change endpoints or column mappings later. 3. Basic error handling with email or on-sheet alerts whenever a source is unreachable. 4. ...

    $11 Average bid
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    38 bids

    Full-Stack Engineer (TypeScript) — AI Sales Training Platform Type: Contract 20-30 hrs/wk Location: Remote, with at least 9am–1pm US Central overlap You'd work with: me, the founder. I'm technical, so you won't be translating. What the product is A sales training web app for retail sales reps. Reps roleplay customer conversations with an AI customer, get scored, work through training modules, and practice product knowledge drills. Managers get a dashboard for their store. It runs in the browser and as an Android app on shared in-store tablets. It's live with beta users across several stores, which means the work you do gets used the same week you ship it. What you'd own You'd be the engineer on this product. I set direction, write the specs, an...

    $19 / hr Average bid
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    308 bids

    I need help transferring my online sales records from our internal database into the format my finance team uses for monthly reporting. Every transaction sits in a structured SQL-based system right now; your task is to extract each record, check that all required fields are complete, and key or import the data into the master spreadsheet template I will provide. Because the information comes exclusively from online sales, you will not be juggling in-store or wholesale figures—just web orders. Most of our traffic flows through Shopify, but I occasionally pull reports from Amazon or eBay as well, so being comfortable with all three platforms is a plus even though the first batch is Shopify-heavy. Accuracy matters more than speed. I will spot-check line items against the database,...

    $205 Average bid
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    29 bids

    Built an interactive Power BI dashboard analyzing HR data for over 1000 employees across 3 countries and 7 departments. The dashboard tracks key workforce metrics including total salary, average age, hiring trends, gender diversity, and bonus distribution. Raw data was cleaned and transformed using Power Query, with custom DAX measures built for accurate KPI calculations. The dashboard includes interactive filters (Department, Gender, Job Title, Country, Business Unit) allowing users to explore the data dynamically, along with visualizations like salary distribution charts, employee count by department, global employee distribution maps, and age group segmentation. Designed with a clean, professional layout suitable for business decision-making

    $115 Average bid
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    31 bids

    I need an expert in Freshserver! The freelancer must have at least 2 years of experience and comprehensive knowledge of the entire Freshserver system. They should be bilingual in Chinese and English. Tasks include creating custom fields with custom objects, working with APIs using JSON, SQL Server, Excel or CSV formats. Training sessions will be scheduled for at least 2 hours, typically at 9 or 9:30 PM Central Time, with Saturdays off. Additionally, I need to record the training sessions for future reference. The work will be conducted in English and displayed on screen during the sessions. The project requires availability for at least 5 days.

    $21 / hr Average bid
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    104 bids
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    I am a Computer Engineering student at LDRP Institute of Technology and Research with a strong foundation in technical problem-solving. While my earlier projects centered on building digital experiences, my true passion lies in uncovering patterns and driving strategic decisions through Data Analytics. Currently, my analytical toolkit includes SQL for data wrangling and complex querying, alongside Excel for in-depth data manipulation. I specialize in bringing these raw numbers to life through interactive dashboards and visualizations using Power BI and Tableau, transforming complex datasets into clear, actionable business intelligence. Along with my analytical journey, I have worked as a Mentor in US IT Bench Sales Recruitment, where I developed the communication and leadership skills ne...

    $195 Average bid
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    15 bids

    I need a clean, responsive e-commerce site to showcase and sell my full range of pooja-related items (physical products only). Please handle everything from securing an available domain to launching a fast, mobile-first storefront that feels trustworthy to Indian and international buyers alike. Essential integrations • Payment: Razorpay for domestic orders and PayPal for global customers—both must run through a secure SSL checkout. • Customer experience: product reviews, real-time live-chat support, and the ability to create time-limited discount coupons from the admin panel. Core requirements • Simple catalogue management so I can add new diyas, incense, idols, etc. without touching code. • Intuitive search, category filters, and an optimized cart/c...

    $100 Average bid
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    114 bids

    Our in-house created document control software has been running smoothly on a C#/.NET stack, MS SQL Server, and AWS for several years, but the developer who built and nurtured it is leaving. I need someone who can step in right away, understand the codebase, and keep the software/application stable and performant. The immediate focus is routine maintenance—diagnosing and fixing any bugs that surface and squeezing better performance out of the code, database, and AWS resources. I don’t have a current list of issues, yet I suspect the usual mix of edge-case errors and slow queries will emerge once you start profiling the system. You’ll get full access to the Git repository, SQL scripts, and our AWS environment (EC2, RDS, S3). A thorough walkthrough with the departing deve...

    $15 / hr Average bid
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    234 bids

    I have the core concept and a technical outline for a new medical platform that puts patients first, and now I need a full-stack developer to turn it into a production-ready application. Platform focus The entire experience must revolve around patients—everything from the landing pages to each dashboard screen should guide them effortlessly toward the information or action they need. In addition to the features outlined below, patients will be encouraged to stay engaged through an integrated blog section that delivers health tips and practice news. Stack and architecture • Back-end logic is planned in PHP for traditional server tasks and Node.js for any real-time components that benefit from non-blocking I/O. • A secure SQL database needs to be designed, populated, ...

    $445 Average bid
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    113 bids

    I need to organise all of my customer information in a structured SQL database and give my team a simple way to add or update those records directly from their phones. The core of the job is two-fold: first, design and deploy a clean relational schema that captures names, contacts, addresses, notes and whatever other standard customer fields you would normally expect; second, build a mobile interface that lets users create, read, update and delete those records through straightforward forms. The mobile side can be cross-platform in Flutter or React Native, or native Android if that is faster for you—what matters most is that it connects securely to the database, validates input, and presents a searchable list of existing customers. No CSV imports or external APIs this time; everythi...

    $18 / hr Average bid
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    121 bids

    Build a single Power BI dashboard that pulls data live from my Excel workbooks and our SQL database, then turns that information into clear insights about customer demographics and customer satisfaction. The data model should merge both sources seamlessly, handle refresh schedules, and expose relationships that let me slice results by date, region, product line, and any other key fields you uncover. Inside the report, I want bar charts for quick comparisons, pie charts for proportional breakdowns, and line graphs that reveal trends over time—each fully interactive with tooltips, drill-through, and cross-filtering. Supply the finished .pbix file, document any custom DAX logic, and publish a ready-to-share version to Power BI Service (or show me how in a brief hand-off call). Whe...

    $10 / hr Average bid
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    21 bids

    I need to turn two raw datasets—sales and customer records—into a clean, insight-packed dashboard. Start by profiling the data in Excel or SQL, removing duplicates, filling or flagging missing values, and standardising every date, currency and categorical field so the tables can join cleanly. With trustworthy data in place, build an end-to-end Power BI model: set relationships, create calculated columns and DAX measures, and surface the KPIs that drive our decisions (revenue trends, customer lifetime value, churn, product mix, regional performance). The visuals should be interactive, with slicers that let managers move from an executive overview down to line-item detail. Quick exploratory charts in Excel are welcome, but the final, shareable report must live in Power BI. Deli...

    $19 / hr Average bid
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    29 bids

    AWS Data Engineer Needed — 1:1 Mentor/Tutor to Teach AWS Data Engineering Category: Data Engineering / Cloud Computing / Tutoring & Mentoring Description: I'm looking to build strong AWS Data Engineering skills from the ground up and want an experienced AWS Data Engineer to act as a personal tutor/mentor — covering core concepts, tools, and hands-on skills needed to work as a data engineer on AWS. What I'm looking for: 1:1 sessions (video call) covering AWS data engineering fundamentals and hands-on labs Coverage of core services: S3, Glue, Redshift, Athena, Kinesis, Lambda, EMR, Step Functions, RDS/DynamoDB ETL/ELT pipeline design, data lake vs. data warehouse concepts Python/PySpark for data engineering, SQL for analytics Guidance on real-world project work...

    $20 / hr Average bid
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    79 bids

    I need a concise descriptive analysis of the data currently stored in my relational database. The tables are already structured and populated; what I lack is a clear, statistics-driven snapshot that highlights key totals, averages, distributions, and any obvious trends or anomalies. You’ll connect directly to the database (credentials supplied after award) and: • explore table relationships and data quality, • run summary statistics and frequency counts, • create straightforward visualizations—think bar plots, histograms, heat-maps—that quickly communicate the story behind the numbers, • package everything into a short, well-commented Jupyter Notebook (or SQL script plus slides, if you prefer) so I can reproduce the results at any time. Plea...

    $30 / hr Average bid
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    49 bids

    I want to extend my Dolibarr installation with a small module that lets me attach JPEG product images directly from the product card and enter one or more manual tags at the moment of upload. The goal is to make daily catalogue maintenance quicker: staff should be able to drag-and-drop a .jpg, type the tags, save, and instantly see the image in the gallery section of the product together with its tags. Key points • Only JPEG files have to be accepted, with basic size validation and automatic thumbnail generation. • Tags are plain-text keywords entered by the user; they need to be stored in the database and displayed under each image, with the ability to filter/search products by those tags later on. • The solution must respect Dolibarr’s module guidelines so I...

    $18 / hr Average bid
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    85 bids

    I run a finance operation that relies on up-to-the-minute market data. What I need now is a streamlined MIS process that turns those feeds into clear, insightful reports and dashboards. You’ll work with market data exclusively, shaping it end-to-end: extracting with SQL, modelling in Excel for quick ad-hoc views, and visualising in Tableau for daily management reporting. Everything must refresh automatically so my team can focus on decisions, not data wrangling. Deliverables • SQL scripts that pull and aggregate the required market data on a schedule • An Excel model with clean, pivot-ready tables and scenario analysis sheets • Interactive Tableau dashboards (published to our server) featuring drill-downs, KPIs, and one-click PDF exports • A concise hand...

    $5 / hr Average bid
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    16 bids

    I have an existing SQL database that needs regular, accurate data entry and ongoing management. The core of the work is keeping every record current, validating each new entry against our existing tables, and running simple queries to confirm that key fields stay consistent over time. You will receive raw data files (mostly CSV) on a scheduled basis. I’ll expect you to import them, reconcile any duplicates, flag inconsistencies, and confirm successful inserts. Familiarity with basic normalization rules, foreign-key constraints, and indexing is important because I want the tables to remain fast and reliable as they grow. Deliverables: • Cleaned, imported data sets fully integrated into the SQL database • A brief log of changes, issues found, and resolutions for each ba...

    $10 / hr Average bid
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    26 bids

    I want a sleek, self-refreshing Power BI dashboard that pulls customer counts from two sources—an Excel file and our Databricks environment—and visualises the 12-month trend for each line of business across Brand A, Brand B and Brand C. The core visual should be clean line charts with a rolling monthly view, allowing users to toggle brands or drill down by product line without losing the last-year perspective. You will work with my existing Databricks SQL endpoint (I’ll share the cluster URL and credentials) and a locally stored Excel workbook. I need the model set up so both sources refresh automatically through the Power BI gateway and any new month appended to either source rolls straight into the visuals. Deliverables • A .pbix file containing the data model, r...

    $439 Average bid
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    112 bids

    Power BI – Talent Acquisition Control Tower & Executive Dashboard We are looking for an experienced Power BI Developer / HR Analytics Specialist to build a comprehensive Talent Acquisition Control Tower & Executive Dashboard. This is not a basic visualization project. We need a scalable recruitment analytics solution covering the full recruitment lifecycle: Requisition → Sourcing → Screening → HM Review → Interview → Selection → Offer → Acceptance → Joining → Closure The solution must support both daily recruitment operations and executive-level reporting. 1. Recruitment Overview & Demand vs Delivery Track: * Total Requisitions * Total Openings/Vacancies * Open / Closed / Hold / Cancelled * Sourcing / Interview / Offer /...

    $103 Average bid
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    42 bids

    I have a production oracle instance that has grown beyond 100 GB and it now needs to live on SQL ,Server postgres sql . The task covers everything from preparing the source, mapping the schema, transferring the data, and validating that every object—tables, views, functions, and constraints—behaves exactly the same once it lands in SQL Server. Here is what I expect to walk away with: • A fully migrated SQL Server database, ready for cut-over • A repeatable migration script or SSIS/ADF/DMS pipeline so I can re-run the process for future refreshes • A concise migration report highlighting any datatype conversions, performance tweaks, and objects that required special handling • Verification scripts or queries that prove row counts, checksums, and refe...

    $11 / hr Average bid
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    30 bids

    I’m putting together a lightweight ERP foundation and need a clean, well-structured VB.Net solution that I can grow over time. The stack is fixed—VB.Net with DevExpress WinForms controls on the front end and PostgreSQL on the back. Core scope The project centres on three building blocks: a secure login screen, a ribbon-style main menu, and one fully functional CRUD form that will serve as the model for future modules. Authentication must recognise three separate roles—Administrator, Manager, and Employee—and enforce granular permissions once the user is inside the application. Main menu expectations After a successful login the user should land on a DevExpress-based menu that exposes the Reporting Module, Settings & Preferences, and User Management. Menu...

    $563 Average bid
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    165 bids

    I need an Oracle APEX application that streamlines one of our internal business processes from start to finish. The focus is a clean, permission-based workflow that automatically routes each new record through a multistep approval cycle. At a minimum the app must: • Capture data through responsive APEX forms • Trigger an approval workflow the moment a record is submitted • Update status, log every decision, and prevent users from skipping steps When an approver acts, the system should move the item to the next stage, send the correct email or in-app notification, and maintain an audit trail we can export to CSV or view in a dashboard. I will provide table definitions and sample data; you’ll translate that into APEX pages, processes, and any PL/SQL packages req...

    $10 / hr Average bid
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    37 bids

    I’m kicking off a new healthcare patient-management system and the first critical piece is a rock-solid, compliant data layer. The entire scope at this stage revolves around database management—designing, building, and documenting a schema that can safely house patient records, appointments, clinical notes, and billing details while meeting HIPAA-level security expectations. Here’s what I need from you: • Analyse typical patient-care workflows and translate them into an efficient relational model. • Deliver an ER diagram, a fully normalised schema, and an indexing strategy suitable for high-volume queries. • Implement the model in the SQL engine you recommend (PostgreSQL, MySQL, or MS-SQL are all fine if they cover encryption-at-rest, robust backup, a...

    $259 Average bid
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    40 bids

    We are seeking an experienced Full Stack Developer to support the development and enhancement of modern web applications. The ideal candidate will have strong experience building scalable front-end and back-end solutions, developing APIs, working with databases, and collaborating with engineering teams to deliver high-quality software. The role involves developing and maintaining user-facing applications using technologies such as React, Angular, Node.js, .NET, or Java. Responsibilities include building and integrating REST APIs, working with SQL and NoSQL databases, troubleshooting application issues, improving existing features, participating in code reviews, and supporting continuous improvement of development practices. Experience with Git workflows and cloud deployment environments...

    $23 / hr Average bid
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    424 bids

    Estou viajando e preciso fazer 2 trabalhos relativamente simples para minha faculdade online de Analise e desenvolvimento de sistemas, Só ter conhecimento moderado em programação

    $35 Average bid
    $35 Avg Bid
    33 bids

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