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I will write, fix, and optimize your sql queries for mysql, postgresql, and oracle
Full Stack Developer
I'm a detail-oriented Full-Stack Developer and QA Specialist with a Master's in Computer Science and Big Data Analytics. I worked as a Software Tester at HSBC for one year, testing their banking app, ...
About this Gig
Whether you're dealing with a broken query, struggling to get the right results from your database, or need a complex query written from scratch I can help.
With a Master's degree in Computer Science and hands-on experience working with relational databases across academic and professional projects, I deliver clean, accurate, and well-documented SQL solutions.
What I can help you with:
- Writing SELECT, INSERT, UPDATE, and DELETE queries
- Fixing broken or incorrect queries
- Writing complex JOINs, subqueries, and aggregations
- Creating and modifying tables (DDL)
- Writing stored procedures and PL/SQL blocks (Oracle)
- Debugging query errors and unexpected results
Databases I work with: MySQL | PostgreSQL | Oracle
What you will receive:
- Clean, working SQL code
- Brief explanation of the logic behind each query
- A file you can copy and run directly in your database
Who I work with: Students, developers, and businesses of all sizes are welcome. No project is too small.
To get started quickly, please have your table structure or schema ready when placing your order.
Delivery within 1 to 3 business days depending on complexity. Revisions included in all packages.
Database type:
Relational database
Platform:
MySQL
•
Oracle
•
PostgreSQL
Expertise:
SQL
•
DDL
•
DML
•
DQL
FAQ
What do I need to provide to get started?
Please share your table structure or schema, a description of what you need the query to do, and your database type (MySQL, PostgreSQL, or Oracle). The more context you provide, the faster I can deliver.
Will you explain the queries you write?
Yes. Every delivery includes a brief explanation of the logic behind each query so you understand exactly how it works.
What if the query doesn't work on my end?
That's what revisions are for. Share the error message and I'll fix it within your included revision count.
Can you work with my existing database?
Yes. You don't need to share your actual data — just the table names, column names, and data types are enough for me to write accurate queries.
Do you handle very large or complex databases?
For straightforward query writing and debugging yes. For full database architecture or performance tuning on large production systems, feel free to message me first to discuss the scope.
