How to fix the Oracle error PLS-00405: subquery not allowed in this context?

In this post, you’ll learn more about the Oracle ErrorPLS-00405: subquery not allowed in this context with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00405: subquery not allowed in this context

Reason for the Error PLS-00405: subquery not allowed in this context

A subquery was used in an inappropriate context, such as: if (SELECT deptno FROM emp WHERE … ) = 20 then … Subqueries are allowed only in SQL statements.

How to fix the Error PLS-00405: subquery not allowed in this context ?

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

The same result can be obtained by using a temporary variable, as in: SELECT deptno INTO temp_var FROM emp WHERE …; IF temp_var = 20 THEN …