The Ultimate Course for cracking Interviews with SQL Questions. The course cover basic to advance level question

What you'll learn
Basic to advanced SQL query writing
Joins and subqueries
Normalization and denormalization
Entity-Relationship Diagrams (ERDs)
Indexing and performance optimization
Window functions
Common Table Expressions (CTEs)
Stored procedures and functions
Triggers and events
Aggregations and grouping
Query optimization
Problem-solving techniques
Explaining complex queries
Whiteboarding SQL solutions
Data preparation and cleaning
Security and access control

Requirements
No Programming Experience is Required

https://www.udemy.com/course/crack-sql-interview-200-questions-with-concept-building