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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...
Level 1
Has met certain performance criteria and shows strong potential in the marketplace.
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.
