How to fix the Oracle error PLS-00108: declarative units must be a single variable declaration?

In this post, you’ll learn more about the Oracle ErrorPLS-00108: declarative units must be a single variable declaration with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00108: declarative units must be a single variable declaration

Reason for the Error PLS-00108: declarative units must be a single variable declaration

While checking a declarative unit (a top-level declare block without the BEGIN…END), PL/SQL found that there was more than one item declared or that the item was not a variable declaration. A table is a common variable declaration at the unit level. To define a TABLE, compile a DECLARE compilation unit, but only one at a time is allowed.

How to fix the Error PLS-00108: declarative units must be a single variable declaration ?

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

Declare variables in separate declarative units.