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Difference between Decode and Case?

Answer Posted / vasu

Decode: using for reporting purpose. and it is implemented
by if stmt.
Ex: select decode(job,'CLERK','executive',job) from emp;

Case : implemented by if & elsif condition. it is using
pl/sql equality conditionality.
Ex : select case job='CLERK' then 'executive' else 'no' end
a from emp;

it is also used for multipul colms & multi conditions.

in above stmt a is reffered alias name.

Is This Answer Correct ?    24 Yes 16 No



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