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!

Na podstawie 299,479 opinii klienci oceniają nas na SQL Developers 4.9 na 5 gwiazdek.
Zatrudnij użytkownika 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!

Na podstawie 299,479 opinii klienci oceniają nas na SQL Developers 4.9 na 5 gwiazdek.
Zatrudnij użytkownika SQL Developers

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    I have a dataset that needs a focused trend analysis and I’d like your help with the data cincse side of things. What matters most to me is uncovering clear patterns, explaining what drives them, and presenting the results in a way that makes next-step decisions obvious. Here’s what I have in mind: • Work through the raw data, clean it where necessary, and structure it for analysis. • Carry out the core trend analysis, highlighting any seasonality, upward or downward movements, and outliers that deserve attention. • Summarise the findings visually—charts, dashboards, or other intuitive visuals—so stakeholders can grasp the story at a glance. • Deliver a concise report (code notebook or slide deck) that walks through your methodology and ke...

    $7417 Average bid
    $7417 Średnia Oferta:
    55 składanie ofert

    I’m bringing a few full-stack candidates through the final hiring stage and need a seasoned developer who can step in as an impartial interviewer. Your task is to Interview and also do a coding test that blends practical Java and Spring problems with quick front-end twists (Angular or React) and some database touches in plain SQL. I’m counting on you to: • design or select one cohesive exercise that covers back-end, front-end, and data layers • host a 30-minute live interview, guiding the candidate while observing problem-solving habits • score their solution for correctness, code quality, and architectural thinking, then give concise written feedback within 24 hours I’m looking for someone at a comfortable mid-level of interviewing experience&...

    $3 / hr Average bid
    $3 / hr Średnia Oferta:
    26 składanie ofert

    Overview: This opportunity is supporting a large-scale, multi-year Oracle business transformation for a major utility organization. The company is implementing several Oracle platforms across the enterprise, including Oracle NMS (Network Management System), Customer-to-Meter (C2M), Oracle Field Service, and Oracle Integration Cloud (OIC), with a major go-live scheduled later this year. The team is looking to bring more integration expertise in-house rather than relying on external consulting partners, creating an opportunity for an experienced Oracle Integration Cloud (OIC) Engineer to play a key role in building and supporting enterprise integrations. This is a hands-on engineering position focused on designing, developing, and maintaining integrations between critical utility and opera...

    $716 Average bid
    $716 Średnia Oferta:
    19 składanie ofert

    To position yourself as the ideal candidate for this Business Directory & MLM Portal project, your pitch should directly align your data, engineering, and reporting capabilities with the client’s key requirements: * Data Engineering & Complex Logic Expertise: The project requires a robust multi-level marketing (MLM) workflow featuring accurate, tiered commission tracking and scalable backend architecture. Your expertise in data structures, relational databases, and complex backend logic ensures that downline calculations, commission triggers, and data integrity remain flawless as the network scales. * Advanced Analytics & Custom Business Intelligence: The client explicitly asks for clear sales-reporting tools filterable by date, team, or product, along with data export ...

    $279 Average bid
    $279 Średnia Oferta:
    86 składanie ofert

    I’m working on a university assignment that calls for a fully-functional Microsoft Access (.accdb) database. The scenario revolves around three core entities—Products, Customers, and Orders—so those will be the three related tables, each with its own primary key and enforced referential integrity. I already have partial field lists in mind but need a bit of guidance on tightening data types and any additional fields that would make the relationships robust. The assignment requirements are straightforward: • Three related tables (Products, Customers, Orders) with primary keys and proper relationships • 15–20 sample records in every table • At least two meaningful queries that demonstrate the relationships • One clean data-entry form for da...

    $24 Average bid
    $24 Średnia Oferta:
    43 składanie ofert
    Custom WordPress Job Board Plugin
    4 dni left
    Zweryfikowany

    I need a tailored WordPress plugin that lets me manage job profiles (we treat each profile as a complete job description) from both the admin dashboard and a simple front-end interface for my registered users. Core workflow • Admins must be able to add, edit, hide, delete, and reorder profiles, as well as flag any of them as Available, Closing Soon, or Unavailable. • Registered users should have a pared-down view where they can create or update their own profiles but never touch someone else’s data. • Each profile stores role, experience, skills, location, work authorization, and availability. Skills need to be grouped by skill type—think technical vs. soft skills—to keep filtering clean. • From the admin side I want the freedom to expand or r...

    $92 Average bid
    $92 Średnia Oferta:
    68 składanie ofert

    Every Friday our bank sends a fresh batch of lockbox figures that must land in our Microsoft SQL Server database before Monday opens. The files are already structured for direct database entry, so the job is simple but must be done with perfect accuracy: take the numeric data, connect to our SQL Server instance, and insert it into the designated tables using the column mapping I’ll provide. You’ll receive: • Remote credentials to the staging and production environments • A short data-dictionary detailing table names, primary keys, and constraints • A weekly hand-off schedule with cut-off times so the accounting team can reconcile on time Your part each week: 1. Import the numeric data set exactly as supplied—no reformatting needed. 2. Validate row...

    $9 / hr Average bid
    $9 / hr Średnia Oferta:
    10 składanie ofert

    I have a series of L2 application-support interviews coming up and I want to walk in sounding like someone who has already spent years on the job. The roles focus on web applications running on a Java stack, so I’m looking for a mentor who can share genuine, real-time experience: how tickets arrive, which logs you pull first, what metrics matter, and where you usually find the root cause. I’d like our sessions to feel like the daily stand-ups and war-rooms that actually happen in production environments. That means screen-sharing while we recreate incidents, stepping through JVM thread dumps, reviewing SQL slow-query logs, debating whether the issue lives in the code, the container, or the underlying infrastructure, and then drafting the kind of crisp RCA report hiring manager...

    $7 / hr Average bid
    $7 / hr Średnia Oferta:
    22 składanie ofert

    Created an interactive Power BI dashboard to analyze sales performance, revenue trends, product categories, and regional insights. Cleaned and transformed raw data using Power Query, created KPIs and visual reports to help businesses track performance and make data-driven decisions.

    $9 / hr Average bid
    $9 / hr Średnia Oferta:
    19 składanie ofert

    Summary Need a Data Pipeline Engineer (Python / ETL / PostgreSQL) We are looking for an experienced Data Pipeline Engineer to integrate multiple food databases into an existing production backend. Important: This is not a greenfield project. The backend, database schema, APIs, and food intelligence engine have already been built. Your role is to build and maintain the ingestion pipelines that feed the existing system. Current Backend Status * Existing PostgreSQL database schema * Existing backend APIs * Existing food scoring engine * Existing product model and normalization framework * Existing infrastructure for product ingestion Scope of Work Build reliable ingestion pipelines to import, clean, normalize, validate, and synchronize data from the following sources: * Open Food Facts...

    $128 Average bid
    $128 Średnia Oferta:
    110 składanie ofert

    I need a professional, enterprise-level Tableau project that simulates a real-world K-12 school district analytics solution rather than a basic dashboard. The project should solve actual business problems faced by district leadership, such as identifying at-risk students, monitoring attendance, evaluating academic performance, measuring MTSS intervention effectiveness, analyzing behavior trends, and tracking equity across student groups. It should include a realistic dataset (15,000–25,000 records), a well-designed star schema data model, SQL scripts for data extraction and transformation (using joins, CTEs, window functions, aggregations, and data validation), and six interactive Tableau dashboards: Executive Overview, Attendance Analytics, Academic Performance, MTSS Analytics, Eq...

    $60 Average bid
    $60 Średnia Oferta:
    24 składanie ofert

    I need to move roughly 10,000 alphanumeric records a week from a legacy database into our new cloud-based CRM while maintaining at least 99.8 % accuracy. Speed is important, yet data integrity is critical, so every step must be logged and verifiable. The workflow starts in Excel: you will clean, normalise and de-duplicate each weekly batch using advanced functions—pivot tables, VLOOKUP/HLOOKUP and macros are the usual tools here. Once the data is spotless, you will prepare import-ready CSVs and load them into the CRM, either through its native wizard or via an SQL script if that proves faster and keeps the audit trail intact. Throughout the process you will spot discrepancies early, note them in a change log and adhere to strict information-security guidelines (encrypted files, res...

    $201 Average bid
    $201 Średnia Oferta:
    19 składanie ofert

    I need a well-structured database focused on storing customer details for my company. I have not locked myself into any single platform, so I’m open to either a traditional SQL solution (MySQL, PostgreSQL, SQL Server) or a NoSQL option (MongoDB, Firestore) if you can explain why it’s the better fit. Scope of work • Analyse my current customer information flow and recommend the most suitable database architecture. • Design the schema to hold core customer data—at minimum names, phone numbers, and email addresses—plus space for additional fields such as purchase history or demographic insights that we may add later. • Build the database, populate it with a small sample dataset, and document the structure. • Provide clear instructions (or sim...

    $19 / hr Average bid
    $19 / hr Średnia Oferta:
    129 składanie ofert
    Retail Chain
    3 dni left
    Zweryfikowany

    Project Name : Retail Chain Project Details : Converting Main frame DB2 legacy application into Azure application using APIS and Azure key vault code . Project technology: Dotnet , API,SQL,Azure key vault,Azure Dev,Azure AI, Azure ADMIN .

    $4 / hr Average bid
    $4 / hr Średnia Oferta:
    29 składanie ofert

    Summary We're looking for a talented Software Developer based in Latin America to join our team full-time. This is a unique opportunity for someone who wants to grow with an early-stage company. Instead of a traditional salary, compensation will be based on a profit-sharing model, allowing you to share in the company's success as we grow. Requirements Based in Latin America (LATAM) Fluent in English and Spanish Strong experience with at least one of the following: Python Node.js C# Experience with SQL and/or NoSQL databases Familiarity with GitHub and Git workflows Understanding of CI/CD pipelines Strong communication and collaboration skills Available to work full-time Nice to Have Experience with cloud platforms (AWS, Azure, or GCP) Docker and containerization Startup or SaaS...

    $9 / hr Average bid
    $9 / hr Średnia Oferta:
    80 składanie ofert

    Buscamos un/a Técnico/a IT con perfil analítico para gestionar bases de datos de clientes, campañas de publicidad digital y herramientas de automatización. No buscamos un desarrollador senior, sino una persona organizada, con capacidad de aprendizaje y ganas de crecer profesionalmente. Funciones Gestión y mantenimiento de bases de datos de clientes y contactos. Segmentación de audiencias y organización de información. Configuración, seguimiento y optimización de campañas publicitarias (Meta Ads, Google Ads y otras plataformas). Automatización de procesos y flujos de trabajo. Integración entre diferentes herramientas mediante APIs, webhooks o plataformas no-code. Elaboración de informes y an&...

    $8 / hr Average bid
    $8 / hr Średnia Oferta:
    27 składanie ofert

    I want a Microsoft Access relational database that lets my service team log every piece of client hardware the moment it arrives, follow it through each repair step, and close the loop when it ships back out—all without spreadsheets or paper forms. Core workflow • Intake: a simple form captures serial number, model, client name, date-in, and automatically assigns a job ID. • Live status tracking: technicians update the record as the unit moves through diagnosis, parts ordering, repair, testing, and dispatch, so anyone can see its current location and status in real time. • History at a glance: each asset’s full maintenance history should be retained and viewable from a single screen. • Daily summary report: at the click of a button I need an automat...

    $19 / hr Average bid
    $19 / hr Średnia Oferta:
    71 składanie ofert
    Repoint Oracle Forms 6i Connection
    1 dnia left
    Zweryfikowany

    I’m maintaining an old Oracle Forms 6i application that still looks for its database at a hard-coded IP address. I WANT MY SYSTEM TO USES THE LOCALHOST INSTEAD Environment in play • Oracle Forms 6i (builder and runtime) Deliverables • pointing DATABASE to / localhost If you’ve previously wrangled Forms 6i connections or migrated apps from fixed IPs to local databases, you’ll be a perfect fit. Let me know how quickly you can jump in and what remote tools you prefer for the hand-over.

    $20 Average bid
    $20 Średnia Oferta:
    13 składanie ofert

    Devo progettare e costruire un sistema di gestione inventario che includa: • Analisi completa con modello E/R, modello relazionale e logico • Script SQL per la creazione e il popolamento delle tabelle • Moduli PHP per registrazione e login degli utenti • Funzione di reportistica focalizzata sulle scorte attuali Mi aspetto documentazione chiara (diagrammi e spiegazioni), codice commentato e istruzioni di deploy. Preferisco soluzioni pulite e facilmente manutenibili; qualsiasi framework leggero in PHP va bene purché mantenga le dipendenze al minimo. Indica nella tua proposta tempi stimati e tecnologie che intendi usare.

    $501 Average bid
    $501 Średnia Oferta:
    98 składanie ofert

    Devo progettare e costruire un sistema di gestione inventario che includa: • Analisi completa con modello E/R, modello relazionale e logico • Script SQL per la creazione e il popolamento delle tabelle • Moduli PHP per registrazione e login degli utenti • Funzione di reportistica focalizzata sulle scorte attuali Mi aspetto documentazione chiara (diagrammi e spiegazioni), codice commentato e istruzioni di deploy. Preferisco soluzioni pulite e facilmente manutenibili; qualsiasi framework leggero in PHP va bene purché mantenga le dipendenze al minimo. Indica nella tua proposta tempi stimati e tecnologie che intendi usare.

    $486 Average bid
    $486 Średnia Oferta:
    93 składanie ofert

    Job Description We are looking for a skilled SQL Data Engineer with hands-on experience in Microsoft SQL Server, Azure Data Factory (ADF), Azure Databricks, SQL Server Integration Services (SSIS), and SQL Server Reporting Services (SSRS). The candidate will be responsible for designing and developing ETL/ELT pipelines, creating and optimizing SQL queries, developing reports and dashboards, managing data integration processes, ensuring data quality, and supporting business intelligence and data warehousing initiatives. The ideal candidate should have strong analytical and problem-solving skills, experience with database performance tuning, and the ability to work collaboratively in a remote team environment. Prefered Skills Microsoft SQL Server, Azure Data Factory (ADF), Azure Databricks,...

    $11 / hr Average bid
    $11 / hr Średnia Oferta:
    39 składanie ofert

    I keep all of my customer information inside a MySQL database and I need reliable help entering new records, updating existing ones, and keeping the data clean and well-organised. The work is entirely database-based—no spreadsheets or external CRMs—so you’ll be working directly with MySQL tables. Here’s what I expect: • Accurate entry of new customer details supplied in batches (CSV or Excel). • Careful validation against existing rows to eliminate duplicates and obvious errors. • Routine clean-up: correcting formatting issues, standardising phone and address fields, and flagging incomplete records for my review. • Simple SQL queries or views that let me pull segmented customer lists quickly. Everything must stay compatible with the cur...

    $2 / hr Average bid
    $2 / hr Średnia Oferta:
    21 składanie ofert

    More details: What platform is your website built on? prestashop Are you using the latest version of PrestaShop? I'm not sure Which product module are you using that causes pressure on the database? Default PrestaShop product module

    $130 Average bid
    $130 Średnia Oferta:
    167 składanie ofert

    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
    $23 / hr Średnia Oferta:
    408 składanie ofert

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