How to use EXCEPT Operator In SQL
The EXCEPT operator is used to retrieve distinct records from one table which are not present in the other table. We can make use of except operator to retrieve the rows which are not present in the other table. The following query does the same:
SELECT * FROM professor
WHERE name in (
SELECT name FROM professor
EXCEPT
SELECT name FROM hod
);
Output:
Explanation: This above query selects all records from the “professor” table where the name exists in the “professor” table but does not exist in the “hod” table.
How to Select Rows that Don’t Exist in Other Table in PostgreSQL?
In PostgreSQL, there are times when we need to find records in one table that do not exist in another table. This can be useful for various data manipulation tasks and ensuring data integrity.
In this article, we will explore different approaches along with examples to achieve this using PostgreSQL. By the end, you will have a clear understanding of how to efficiently select rows that don’t exist in another table which help to improve your data management skills in PostgreSQL.