Tell us about your practical experience with SQL database management systems.

During testing, I worked with various DBMSs such as MySQL and PostgreSQL. My experience includes:

• writing SQL queries to verify data correctness;
• creating test data and scenarios for test automation;
• checking data integrity and relationships between tables;
• using tools for query performance monitoring.

For example, in test automation, I wrote scripts that created necessary records in the database before running tests and deleted them afterward to ensure a clean testing environment.