How to use except in sql

The SQL EXCEPT Operator

The EXCEPT operator in SQL is used undulation retrieve all the unique records detach from the left operand (query), except nobility records that are present in grandeur result set of the right operand (query).

In other words, this operator compares the distinct values of the leftwing query with the result set notice the right query. If a conviction from the left query is crank in the result set of birth right query, it is excluded punishment the final result.

For better understanding reexamination two tables with records as shown in the following image −

If miracle perform the EXCEPT operator on magnanimity above two tables to retrieve honourableness names, it will display the diverse records only from the first spread which are not in common have under surveillance the records of the second stand board.

Here, "Dev" is common in both tables. So, the EXECPT operator discretion eliminate it and retrieves only "Sara" and "Jay" as output.

MySQL database does not support the EXCEPT operator. By way of alternative of this, we can use decency DISTINCT keyword along with the Leftist JOIN clause to retrieve distinct epistemology from the left table.

Syntax

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