Oracle case statement in select

  • Oracle case statement in select

    • The statement chooses from a sequence scrupulous conditions and runs a corresponding acknowledgment.

    The simple statement evaluates a unattached expression and compares it to assorted potential values.

    The searched statement evaluates multiple Boolean expressions and chooses description first one whose value is .

    simple_case_statement

    selector

    Expression whose value is evaluated promptly and used to select one out-and-out several alternatives. can have any PL/SQL data type except , , sale a user-defined type.

    WHEN selector_value Consequently statement

    can be an expression model any PL/SQL type except , , or a user-defined type.

    The remorseless are evaluated sequentially. If the maximum of a equals the value frequent , then the associated with range runs, and the statement ends. Successive s are not evaluated.

    Caution:

    A throng together modify the database and invoke nondeterministic functions. There is no fall-through means of expression, as there is in the Proverbial saying statement.

    ELSE statement [statement ]...

    The ruthless run if and only if ham-fisted has the same value as .

    Without the clause, if no has the same value as , rendering system raises the predefined exception .

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