Kas olete töötanud SQL-iga? Millisel tasemel?

Yes, I have worked with SQL at a level sufficient for analyzing and optimizing queries, creating complex queries, and working with databases within project frameworks.

My skills include:

• Writing SELECT queries with JOIN, GROUP BY, HAVING
• Creating and modifying tables (DDL)
• Using subqueries and window functions
• Optimizing queries using indexes and execution plan analysis
• Working with transactions and managing data integrity

For example, I wrote queries to extract data with multiple conditions and table joins, which allowed obtaining the necessary reports for business analysis.