PLS-00639: NCHAR/NVARCHAR2 cannot be byte length semantics

Cause: NCHAR/NVARCHAR can only be codepoint length sematics. BYTE qualifiers used with NCHAR are illegal: 

nc NCHAR(7 BYTE); 

name NVARCHAR2(10 byte);

Action: Remove BYTE qualifier to make it as codepoint length semantics.

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