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Fiverr Pro
English
$
USD
I will design sql databases, er diagrams and write complex queries
Data Expert, Analysis, Visualization
I’m a Data Expert specializing in data analysis, machine learning, and AI. With a strong academic background and hands-on experience, I transform raw datasets into clean, reliable, and actionable insi...
About this Gig
Looking for someone who can actually make your SQL database work the way you imagined it?
I design and fix real-world databases from first idea and ER diagram all the way to optimized SQL queries and clean documentation. Whether youre a business owner, a developer, or a student with a tricky assignment, I can turn your requirements into a solid, well-structured database.
What I can help you with:
- Writing and debugging SQL queries (SELECT, JOINs, GROUP BY, subqueries)
- Designing database schemas and ER diagrams
- Creating tables, keys, relationships and constraints
- Normalization up to BCNF to remove redundancy
- Optimizing slow queries and improving performance
- Converting Excel/CSV to SQL tables
- Explaining the logic so you actually understand the solution
Tools & Platforms:
MySQL, SQL Server, PostgreSQL, SQLite (and more on request)
Why choose me:
- Clear communication and fast responses
- Clean, well-commented SQL code
- On-time delivery and professional support
Send me a message before ordering so I can review your needs and recommend the best package for you.
Database type:
Object-oriented database
•
Relational database
Platform:
MS SQL
•
MySQL
•
SQLite
•
SQL Server
Expertise:
SQL
•
DDL
•
DML
•
DQL
My Portfolio
Other Databases Services I Offer
FAQ
Q1: What do you need from me to get started?
A: Please share a short description of your problem or project, the database platform you are using (MySQL, SQL Server, PostgreSQL, etc.), any existing schema or ER diagram, and sample data (tables/Excel/CSV) if available. The more details you provide, the better and faster I can help.
Q2: Can you work on my database from scratch?
A: Yes. I can design your database from zero: requirements → ER diagram → normalized tables → keys and relationships → sample SQL queries. Just tell me about your use case (e-commerce, school system, inventory, reservation, etc.) and I will propose a structure.
