Test your foundational knowledge of SQL data cleaning and preprocessing concepts, including handling duplicates, joins, window functions, grouping, and aggregate queries. Perfect for interview preparation and understanding key SQL techniques for structured data management.
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://medium.com/@krthiak/sql-interview-questions-day-95-of-100-days-of-data-engineering-ai-and-azure-challenge-6984530f7868