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.
Explore advanced SQL concepts used to analyze and organize data efficiently, including window functions like ROW_NUMBER, RANK, and DENSE_RANK. Ideal for those looking to excel at real-world analytics and reporting scenarios.
Discover fundamental concepts and best practices commonly assessed in TCS Data Analyst interviews, including SQL operations, Power BI functions, data analysis steps, and problem-solving approaches.
Prepare for your next data analyst interview by reviewing essential concepts in Power BI, DAX, SQL, and data modeling. This quiz covers foundational knowledge, best practices, and scenario-based questions relevant for data analysis roles and business intelligence projects.
Challenge your understanding of SQL joins and aggregations by identifying ten frequent mistakes and their solutions. This quiz targets foundational errors, practical examples, and tips for accuracy in SQL queries related to database systems.