1．搜查型CASE敘述

CASE
WHEN condition1 THEN
statements1
[WHEN condition2 THEN statements2]
…
[ELSE statements3]
END CASE;

 

2.CASE運算式

sex_name :=
CASE sex_type
WHEN ‘M’ THEN ‘男’
WHEN ‘F’ THEN ‘女’
ELSE ‘UNKNOW’
END;

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