How to fix the Oracle error PLS-00326: IN clause must contain same number of expressions as subquery?

In this post, you’ll learn more about the Oracle ErrorPLS-00326: IN clause must contain same number of expressions as subquery with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00326: IN clause must contain same number of expressions as subquery

Reason for the Error PLS-00326: IN clause must contain same number of expressions as subquery

The number of expressions in an IN clause did not equal the number of expressions in a corresponding subquery select list. For example, the following statement is invalid because the IN clause contains two expressions, but the subquery select list contains just one: … WHERE (ename, sal) IN (SELECT sal FROM emp);

How to fix the Error PLS-00326: IN clause must contain same number of expressions as subquery ?

You can fix this error in Oracle by following the below steps

Check the number of expressions in each set, then revise the statement to make the numbers equal.