JavaScript is required to use this application. Please enable JavaScript in your browser settings or disable any extensions that may be blocking scripts.
Real questions from top companies in SQL · medium
Analyze the output of various joins (LEFT, RIGHT, INNER, CROSS, FULL OUTER) on the given tables.
Calculate the cumulative transaction amount for each month using a transaction table.
Can you describe a project where you handled large volumes of data?
Can you modify a partitioned table into a non-partitioned one and vice-versa? How?
Check for duplicates in a table.
Coalesce function in SQL - explain
Compare Airflow's @daily vs once trigger scheduling.
Compare OLTP and OLAP systems in the context of financial transactions.
Get the complete 1,800+ question library with detailed, expert-level answers covering SQL, Spark, System Design, Python, Cloud, and Behavioral topics.