PLS-00644: character set mismatch found at string among result expressions in a CASE expression
Cause: In a CASE expression, the result expressions do not match in character set, and it is unclear which implicit conversion is required to correct the mismatch.
Action: Change the result expressions so that their character sets match.
Cause: In a CASE expression, the result expressions do not match in character set, and it is unclear which implicit conversion is required to correct the mismatch.
Action: Change the result expressions so that their character sets match.
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