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$
USD
I will do sql db design, sql queries and er diagram
Computer Systems Engineer
I am a Computer Systems Engineer with a strong foundation in software development, databases, and process automation.
I specialize in building clean, efficient, and well-structured technical solution...
About this Gig
I will design, fix, and optimize SQL databases using PostgreSQL as my primary engine.
I focus on clean schema design, correct relationships, and efficient queries.
If you need a database that actually makes sense and performs well, I can help.
What I can help you with
- Database design from scratch
- ERD (Entity Relationship Diagram)
- Table normalization & relationships
- Writing and fixing SQL queries
- Debugging slow or broken queries
- Improving existing database structure
Main engine: PostgreSQL
Also supported: MySQL
SQLite: on request
Warning: I do not review external links or files outside of Fiverr. All communication and files must remain on the platform.
Platform:
MySQL
•
PostgreSQL
•
SQLite
•
SQL Server
Expertise:
Design
•
ERD
•
SQL
•
Query optimization
My Portfolio
FAQ
Do you work with MySQL or only PostgreSQL?
Yes. My primary database engine is PostgreSQL, but I also work with MySQL. SQLite is available on request, depending on the project.
Can you fix an existing database or only create new ones?
I can do both. I can fix, refactor, or optimize existing databases, as well as design new schemas from scratch.
Do you provide ERD diagrams?
Yes. For Standard and Premium packages, I include an ERD (Entity Relationship Diagram) to clearly explain the database structure and relationships.
Can you help with slow or broken SQL queries?
Absolutely. I can debug, rewrite, and optimize SQL queries to improve performance and correctness.
Do you use low-code tools like Airtable or Access?
No. I work with pure SQL and relational databases, focusing on clean schema design and best practices.
What do you need before starting?
A short description of your project, the database engine, and any existing schema or queries (if available).
