DB2 - DataBase Abend SQL -811
THE RESULT OF AN EMBEDDED SELECT STATEMENT IS A TABLE OF MORE THAN ONE ROW, OR THE RESULT OF THE SUBQUERY OF A BASIC PREDICATE IS MORE THAN ONE VALUE.
Explanation :: Execution of an embedded SELECT statement has resulted in a result table containing more than one row. Alternatively, a subquery contained in a basic predicate has produced more than one value.