How to fix the Oracle error ORA-22900: the SELECT list item of THE subquery is not a collection type?

In this post, you’ll learn more about the Oracle ErrorORA-22900: the SELECT list item of THE subquery is not a collection type with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-22900: the SELECT list item of THE subquery is not a collection type

Reason for the Error ORA-22900: the SELECT list item of THE subquery is not a collection type

The THE subquery must SELECT a nested table or VARRAY item.

How to fix the Error ORA-22900: the SELECT list item of THE subquery is not a collection type ?

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

change the subquery to SELECT a nested table or VARRAY item.