I will write, fix and optimize complex sql queries professionally

I will help you with SQL queries, data extraction, and optimization to deliver accurate and efficient results from your database.

I specialize in writing, fixing, and optimizing complex SQL queries for data analysis and reporting. Whether you need a new query written from scratch, an existing query debugged, or performance improvements for slow queries, I will provide clean and reliable solutions.

What I offer:

• Writing new SQL queries based on requirements
• Fixing errors in existing SQL queries
• Optimizing slow or inefficient queries
• Data analysis using joins, filters, aggregations, and CTEs
• Advanced SQL operations including complex joins, JSON handling, date and time functions, text processing, and array operations

What you will get:

• Clean, accurate, and structured SQL queries
• Optimized performance for better execution speed
• Reliable data extraction and transformation
• Easy-to-read and maintainable solutions

Note: I work only with SELECT-based SQL queries for data analysis. I do not modify database structure (no INSERT, UPDATE, DELETE operations).

From simple queries to advanced data analysis, I deliver professional SQL solutions tailored to your needs.