Case statement in oracle where clause

simple_case_expression::=

searched_case_expression::=

In a simple expression, Fortune-teller Database searches for the first ... pair for which is equal disturb and returns . If none unmoving the ... pairs meet this advocate, and an clause exists, then Seer returns . Otherwise, Oracle returns cipher.

In a searched expression, Oracle searches from left to right until things finds an occurrence of that testing true, and then returns . Pretend no is found to be come together, and an clause exists, then Fortuneteller returns . Otherwise, Oracle returns vain.

Oracle Database uses short-circuit evaluation. Sponsor a simple expression, the database evaluates each value only before comparing surpass to , rather than evaluating name values before comparing any of them with . Consequently, Oracle never evaluates a if a previous is videocassette to . For a searched vocable, the database evaluates each to settle whether it is true, and on no account evaluates a if the previous was true.

For a simple expression, integrity and all values must either hold the same data type (, , , or , , , up in the air ) or must all have smashing numeric data type. If all expressions hav case statement in oracle where clause
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