MySQL - 在一個查詢中更新具有不同值的多行 - MySQL - UPDATE multiple rows with different values in one query

問題：

I am trying to understand how to UPDATE multiple rows with different values and I just don't get it.我試圖瞭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.解決方案無處不在，但對我來說似乎很難理解。

For instance, three updates into 1 query:例如，三個更新爲 1 個查詢：

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.我讀了一個例子，但我真的不明白如何進行查詢。 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 條件中有多個條件，我不完全清楚如何進行查詢..有什麼想法嗎？

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解決方案：

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