I will write, fix and optimize complex sql queries for mysql, oracle, postgresql

Stuck on a tricky query, or is your database running slow? I write, fix and speed up SQL queries for Oracle, MySQL, SQL Server, PostgreSQL, MS Access and SQLite.

I can help with:

• Complex joins, subqueries, CTEs and window functions
• Reports, aggregations and pivots
• Query optimization and indexing
• Fixing errors in existing queries
• Database design and ER diagrams
• Data migration, import and export
• Stored procedures, views, functions and triggers

Why me:

• Oracle-certified database developer
• 20 five-star reviews on this gig, 160+ orders overall
• Clear explanations so you understand the solution
• Fast delivery and support after delivery

Send me your table structure (or sample data) and the result you need. Message me first if you'd like a quick estimate.