记录一些sql函数-CONCAT_WS,CONCAT等

select CONCAT_WS(',',t.user_landphone,t.user_name,t.user_sex,t.user_birthday,t.province) from lot_user t  WHERE t.user_landphone IS NOT NULL;函数 select CONCAT(t.user_landphone,‘,’,t.user_name,‘,’,t.use

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