SQL Interview Questions

Right Join is used to retrieve rows which are common between the tables and all rows of a Right-hand side table. It returns all the rows from the right-hand side table even though there are no matches in the left-hand side table. In SQL, a RIGHT JOIN is a type of JOIN operation that returns … Read more

Inner join returns rows when there is at least one match of rows between the tables. INNER JOIN keyword joins the matching records from two tables. In SQL, an INNER JOIN is a type of join that combines rows from two or more tables based on a related column between them. The result includes only … Read more

joins are used to merge two tables or retrieve data from tables. It depends on the relationship between tables. Following are the most commonly used joins in SQL: Inner Join: inner joins are of three type: Theta join Natural join Equijoin Outer Join: outer joins are of three type: right outer join Left outer join … Read more

Most commonly used SQL joins are INNER JOIN and LEFT OUTER JOIN and RIGHT OUTER JOIN. The most commonly used SQL joins are: INNER JOIN: Retrieves records that have matching values in both tables. It returns only the rows where there is a match in both tables based on the specified condition. LEFT JOIN (or … Read more

There is a built-in function in SQL called GetDate() which is used to return the current timestamp. In SQL, you can use the GETDATE() or CURRENT_TIMESTAMP function to retrieve the current date and time. If you only want the current date, you can use the CAST or CONVERT functions to extract the date part. Here … Read more