suresh What is the difference between the WHERE and HAVING clauses in SQL?
In SQL, the WHERE clause is used to filter rows before any groups are formed while the HAVING clause is used to filter groups after they have been formed. This means that the WHERE clause is applied to individual rows, whereas the HAVING clause is applied to groups.
The WHERE clause is used with the SELECT, INSERT, UPDATE, or DELETE statements to filter records based on a specified condition. On the other hand, the HAVING clause is used with the GROUP BY clause to filter rows based on a group condition.
For instance, if you want to filter out individual records based on a certain condition, you would use the WHERE clause. However, if you want to filter out grouped results based on a condition, you would use the HAVING clause.
Understanding the difference between the WHERE and HAVING clauses in SQL is essential for writing efficient and effective SQL queries.
For more information on this topic, feel free to check out our related articles or get in touch with our SQL experts.
Please login or Register to submit your answer