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What's the best way to query the catalog to check varchar2 columns

in Database Administration (MOSC) 2 commentsAnswered ✓

What's the best way to query the catalog to determine if a varchar2 was declared with BYTE or CHAR length semantics. We're try to logical migrate a schema from 12c to 19c where the CHARACTER_SET is going from WE9ISO8859P9 to UTF8 and so some characters become two or more bytes. So our thought is to update the definition in the source system from BYTE to CHAR for those varchar2 columns that have issues.

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