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What is DAX?
Last Updated: December 3, 2025DAX stands for Data Analysis Expressions — it’s a formula language used in Power BI, Excel Power Pivot, and SQL...
How can you avoid SQL injection attacks?
Last Updated: December 2, 2025To avoid SQL injection attacks, the key is to ensure that user input is never directly concatenated into SQL queries....
What is referential integrity in SQL?
Last Updated: December 2, 2025Referential integrity in SQL is a rule that ensures the relationship between two tables remains consistent — it makes sure...
How do you perform a full outer join in SQL?
Last Updated: December 2, 2025A FULL OUTER JOIN in SQL is used to return all records from both tables, matching the rows where possible,...
How do you create a temporary table in SQL?
Last Updated: December 2, 2025A temporary table in SQL is a table that exists only for the duration of a session or a specific...
How do you implement pagination in SQL?
Last Updated: December 2, 2025Pagination in SQL is used to fetch a specific subset of records (like page 1, page 2, etc.) instead of...
Explain ACID properties in SQL.
Last Updated: November 3, 2025The ACID properties in SQL represent the four key principles that ensure reliability, consistency, and integrity of transactions in a...
What is the use of TRIGGER in SQL?
Last Updated: December 2, 2025A trigger in SQL is a special kind of stored procedure that automatically executes (or fires) in response to a...
How do you write a SQL query to find all employees who joined in the last 6 months?
Last Updated: December 2, 2025To find all employees who joined in the last 6 months, I use a date function to compare the employee’s...
How can you use GROUP_CONCAT() function in SQL?
Last Updated: December 2, 2025The GROUP_CONCAT() function in SQL is used to combine multiple row values into a single string — it’s especially useful...