ORA-01427 single-row subquery returns more than one row
What causes an ORA-01427 error?
The outer query must use one of the keywords ANY, ALL, IN, or NOT IN to specify values to compare because the subquery returned more than one row.
How Xynomix can help
Use ANY, ALL, IN, or NOT IN to specify which values to compare or reword the query so only one row is retrieved.
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