PLS-00319: subquery in an IN or NOT IN clause must contain exactly one column
Cause: An invalid expression such as X IN (SELECT A,B ...) was used. When a [NOT]IN clause is used with a subquery, it does not test for set membership. The number of expressions in the [NOT]IN clause and the subquery select list must match. So, in the example above, the subquery must specify at most one column.
Action: Change the subquery to select only one column.
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