Apache Derby DB Error Code 42X39 – Subquery is only allowed to return a single column.

AbundantCode 2 months ago in Apache Derby 0

In this blog post, let’s learn about the error message “42X39- Subquery is only allowed to return a single column.” in Apache Derby Database and the description of the error.

Error Message

42X39- Subquery is only allowed to return a single column.

Error Details

Subquery is only allowed to return a single column.

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