Database Error Messages

Release
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  • 23ai
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Updated
Jun 24, 2024

ORA-01790

expression must have same datatype as corresponding expression

Cause

A SELECT list item corresponds to a SELECT list item with a different datatype in another query of the same set expression.


Action

Check that all corresponding SELECT list items have the same datatypes. Use the TO_NUMBER, TO_CHAR, and TO_DATE functions to do explicit data conversions.