我试图理解如何用不同的值更新多个行,但我就是不明白。解决方案无处不在,但对我来说,它似乎很难理解。
例如,3次更新为1个查询:
UPDATE table_users
SET cod_user = '622057'
, date = '12082014'
WHERE user_rol = 'student'
AND cod_office = '17389551';
UPDATE table_users
SET cod_user = '2913659'
, date = '12082014'
WHERE user_rol = 'assistant'
AND cod_office = '17389551';
UPDATE table_users
SET cod_user = '6160230'
, date = '12082014'
WHERE user_rol = 'admin'
AND cod_office = '17389551';
我read了一个例子,但我真的不知道如何进行查询。即:
UPDATE table_to_update
SET cod_user= IF(cod_office = '17389551','622057','2913659','6160230')
,date = IF(cod_office = '17389551','12082014')
WHERE ?? IN (??) ;
如果WHERE和if condition..any概念中有多个条件,我不完全清楚如何进行查询?
https://stackoverflow.com/questions/25674737
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