In summary, here are 10 of our most popular quering+databases courses

• SQL for Data Analysis and Business Insights: Coursera
• SQL: A Practical Introduction for Querying Databases: IBM
• SQL at Scale: Querying, Transforming, and Governing: Coursera
• Enterprise Data Wrangling with SQL and Python: Northeastern University
• Optimize Query Performance for Data Success: Coursera
• Optimize SQL Queries: Uncover Performance Bottlenecks: Coursera
• Databases for Data Scientists: University of Colorado Boulder
• Databases and SQL for Data Science with Python: IBM
• Query Spatial with PostGIS: Coursera
• Introduction to Relational Databases (RDBMS): IBM