I will develop sql queries, design sql database projects, and create er diagrams

Don felix

United States

I speak English, French

High Quality Software, Websites and UI That Deliver Results

Hi, I’m Don, a software engineer with 5+ years of experience in web, desktop, and mobile app development. I build reliable, high-performance backend systems and clean, user-friendly frontends. I work ...
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About this Gig

Are you looking for a skilled SQL developer to design your database, write optimized SQL queries, or create a clean ER diagram? You're in the right place!

I specialize in building professional, high-performance SQL databases for businesses, students, and developers. Whether you need a new database, help fixing queries, or assistance with a full database project, Ive got you covered.


What I Offer

SQL Database Design (MySQL, PostgreSQL, SQL Server, Oracle)

ER Diagrams (Crows Foot, UML, Chen)

Complex SQL Queries

  • SELECT, JOIN, UNION, GROUP BY
  • Stored Procedures
  • Functions & Triggers
  • Indexing & Optimization

Complete Database Projects

  • Schema design
  • Relationships & normalization
  • Sample data insertion
  • Documentation

Fixing & Optimizing Existing Databases

  • Improve slow queries
  • Correct database structure
  • Clean and organized schemas

Why Choose Me?

  • 100% original and professional work
  • Fast delivery
  • Clear communication
  • Perfect for academic, business, and production-level projects
  • I handle both small tasks and full advanced systems
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develop sql queries, design sql database projects, and create er diagrams
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develop sql queries, design sql database projects, and create er diagrams

Database type:

Centralized database

•

Graph database

+2 more

Platform:

Airtable

•

MongoDB

•

MS SQL

•

MySQL

•

PostgreSQL

•

SQLite

•

SQL Server

Expertise:

Big data

•

Data structure

•

ERD

•

Normalization

•

NoSQL

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