MySQL - 在一个查询中更新具有不同值的多行 - MySQL - UPDATE multiple rows with different values in one query

问题：

I am trying to understand how to UPDATE multiple rows with different values and I just don't get it.我试图了解如何使用不同的值更新多行，但我不明白。 The solution is everywhere but to me it looks difficult to understand.解决方案无处不在，但对我来说似乎很难理解。

For instance, three updates into 1 query:例如，三个更新为 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'; 

I read an example, but I really don't understand how to make the query.我读了一个例子，但我真的不明白如何进行查询。 ie: IE：

UPDATE table_to_update
SET cod_user= IF(cod_office = '17389551','622057','2913659','6160230')
    ,date = IF(cod_office = '17389551','12082014')
WHERE ?? IN (??) ;

I'm not entirely clear how to do the query if there are multiple condition in the WHERE and in the IF condition..any ideas?如果 WHERE 和 IF 条件中有多个条件，我不完全清楚如何进行查询..有什么想法吗？

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解决方案：

参考一： https://en.stackoom.com/question/1jjAf
参考二： https://stackoom.com/question/1jjAf