Challenge your understanding of SQL queries with this beginner-friendly quiz focused on common interview topics such as selecting unique values, table joins, and data ordering using a hospital database schema. Strengthen your skills in interpreting table relations, essential SQL functions, and logic relevant to healthcare data scenarios.
Discover the most frequent SQL indexing mistakes and how to resolve them with this beginner-friendly quiz. Improve your understanding of index usage, creation, and optimization strategies for efficient database management.
Explore key SQL date and time handling concepts, including extracting components, formatting, arithmetic, and filtering, with practical examples inspired by Snowflake SQL usage. This quiz covers common interview topics for data analysts and engineers on manipulating dates and timestamps using SQL.
Explore fundamental concepts and differences of GROUPING SETS, ROLLUP, and CUBE in SQL for advanced multi-level aggregations, using practical reporting scenarios and clear examples for effective query design.
This quiz covers fundamental SQL concepts, focusing on SELECT statements, WHERE clauses, and basic aggregate functions, essential for roles in data analysis. Test your understanding of SQL syntax and best practices to prepare for a data-focused career.
Source URL
https://www.youtube.com/watch?v=nIbsOKG36qk