I will design sql databases and write complex queries for you

David Z

Italy

I speak English, Italian, Chinese

Database and Financial Data Solutions for Businesses

Hi, I'm David! IT & Accounting student. I combine analytical logic with tech to solve business problems and organize data. What I offer: 🇮🇹 PER ITALIANI: Copywriting SEO (finanza/economia), gestion...
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About this Gig

I am an Information Technology specialist experienced in database design, EER modeling, and data management. Whether you need a database built from scratch, complex queries written for data extraction, or a Python script to interact with your data, Ive got you covered.

What I can do for you:

  • Database Design & Architecture: Creating clean, optimized database schemas and ER/EER diagrams (up to 7+ tables).
  • SQL Query Writing: Developing complex, high-performance SQL queries (JOINS, Subqueries, Aggregations, Stored Procedures).
  • Query Optimization & Debugging: Analyzing and fixing slow or broken queries to improve system performance.
  • Python Integration: Writing clean scripts for automation, data cleaning, or connecting your database to Python applications.

Databases I work with:

  • MySQL / MariaDB
  • PostgreSQL
  • SQLite / SQL Server

Why choose me?

  • Structured, optimized, and well-commented code.
  • Clear database mapping and documentation.
  • Fast response time and professional communication.

Please message me with your project details and requirements before placing an order so we can discuss the best approach for your system!

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design sql databases and write complex queries for you
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design sql databases and write complex queries for youdesign sql databases and write complex queries for you

Database type:

Graph database

•

Key-value database

+2 more

Platform:

MySQL

Expertise:

SQL

•

DDL

•

DML

•

ER diagrams

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