DB2 Error Code – -415 the corresponding columns, column-number, of the operands of a union or a union all do not have comparable column descriptions

In this post, you’ll learn about the error message -415 the corresponding columns, column-number, of the operands of a union or a union all do not have comparable column descriptions in the IBM DB2 database , the reason why it occurs along with the solution to fix it

IBM DB2 Error Message

-415 the corresponding columns, column-number, of the operands of a union or a union all do not have comparable column descriptions

Reason for the Error

The column descriptions of corresponding columns of the operands of a UNION or UNION ALL must be comparable.� The columns of ordinality ‘column-number’ of the operands in this UNION or UNION ALL do not satisfy this requirement.� For columns to be comparable, they must both be either numeric, character, graphic, date, time, or timestamp. They cannot be a mixture of these groups.� If corresponding columns have field procedures, they must both have the same field procedure.

Solution

Check the data types of the specified columns and correct the UNION or UNION ALL statement so that all corresponding columns have comparable column descriptions.