摘要: 簡(jiǎn)單 CASE 函數(shù)：
CASE input_expression
WHEN when_expression THEN result_expression
[ ...n ]
[
ELSE else_result_expression
END
CASE 搜索函數(shù)：
CASE
WHEN Boolean_expression THEN result_expression
[ ...n ]
[
ELSE else_result_expression
END
閱讀全文