mysql操做查詢結果case when then else end用法舉例

舉例1：

使用該查詢，得出iFavoriteID,iFavUserType ,cUser,iArticleID,dFavoriteTime五個字段的值:

SELECT iFavoriteID,

CASE WHEN iFavUserType = 0 THEN '新聞管理員'

WHEN iFavUserType = 1 THEN '商家'

WHEN iFavUserType = 2 THEN '會員'

WHEN iFavUserType = 3 THEN '未註冊'

WHEN iFavUserType = 4 then '匿名'

END AS iFavUserType, cUser, iArticleID,

CONVERT(nvarchar(100), dFavoriteTime, 111) AS dFavoriteTime FROM dig_favorite

舉例2：

SELECT CASE WHEN `MEMBERTYPE` =1

THEN '參賽隊員'

ELSE '指導老師'

END FROM `tab_sign_member`

WHERE 1