SQL Quizzes

Explore effective solutions for handling ORA-01805 timestamp errors in SQL databases using SQLAlchemy. This quiz covers common causes, SQL parameter handling, driver compatibility, and best practices to prevent timestamp-related issues.

Strengthen your SQL expertise with practice on rolling averages, partitions, and window functions for advanced analytics. This quiz is designed for learners preparing for interviews who want to build confidence with real-world data analysis patterns in SQL.

Test your skills in both Splunk and SQL with questions on search queries, data parsing, joins, aggregations, and optimization techniques. This quiz is designed for learners preparing for 2025 interviews who want to demonstrate strong abilities in log analysis and relational data handling.

Test your combined knowledge of SQL and Power BI, covering data extraction with queries, joins, and aggregations, alongside modeling, DAX basics, and visualization in Power BI. This quiz is designed for aspiring data analysts who want to showcase both technical querying skills and business intelligence expertise in interviews.

Test your readiness for interviews with questions on SQL fundamentals, PostgreSQL-specific features, indexing, transactions, and performance tuning. This quiz is designed for learners who want to confidently showcase their relational database expertise in real-world interview settings.

Test your foundational knowledge of calculating signup activation rates in SQL using relational tables like emails and texts. This quiz covers concepts such as table relationships, JOIN types, aggregate functions, and rounding results—key areas for SQL interview preparation.

Test your SQL skills with questions on COUNT, SUM, AVG, MIN, MAX, and GROUP BY to analyze and summarize data effectively. This quiz is designed for learners who want to strengthen their understanding of aggregation functions and prepare for common interview questions.

Explore essential SQL concepts and database design best practices with this quiz, covering key topics such as relational tables, normalization, query syntax, and data integrity. Ideal for learners seeking a solid foundation in working with databases and understanding basic SQL operations.

Assess your fundamental knowledge of SQL, including common commands, syntax, and essential concepts. This quiz is designed for beginners seeking to test their understanding of SQL Level 1 topics.

Practice the fundamentals of SQL with questions on SELECT statements, WHERE clauses, simple joins, and aggregations. This quiz is designed for beginners who want to build a strong foundation and prepare for entry-level database interviews or coursework.

Test your knowledge of fundamental SQL concepts, clauses, and query techniques with this easy, beginner-friendly quiz. Improve your understanding of SQL syntax, filtering, data grouping, and join operations in preparation for interviews or academic assessments.

Test your knowledge of SQL techniques for finding the median salary in a database table, with questions covering window functions, aggregation, and practical query logic. This quiz is ideal for those preparing for interviews or enhancing SQL analytics skills.

Test your knowledge of SQL CRUD operators—Create, Read, Update, and Delete—along with filtering, conditions, and joins for practical database tasks. This quiz is designed for learners who want to strengthen their SQL foundations and gain confidence in performing everyday operations on relational databases.

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.

Review the must-know SQL concepts for data analyst roles, including filtering, grouping, aggregations, and joins on relational datasets. This quiz is designed for learners who want to strengthen their SQL foundations and get interview-ready with practical query skills.

Practice beginner-friendly SQL problems involving ratios, category-based aggregations, and simple cumulative sums using window functions. This quiz is designed for learners who want to strengthen their query-building confidence and prepare for common interview-style questions.