MySQL 中的多次更新
我知道您可以一次插入多行，有没有办法在 MySQL 中一次更新多行(如在一个查询中)?
I know that you can insert multiple rows at once, is there a way to update multiple rows at once (as in, in one query) in MySQL?
例如我有以下内容
Name id Col1 Col2
Row1 1 6 1
Row2 2 2 3
Row3 3 9 5
Row4 4 16 8
我想将以下所有更新合并为一个查询
I want to combine all the following Updates into one query
UPDATE table SET Col1 = 1 WHERE id = 1;
UPDATE table SET Col1 = 2 WHERE id = 2;
UPDATE table SET Col2 = 3 WHERE id = 3;
UPDATE table SET Col1 = 10 WHERE id = 4;
UPDATE table SET Col2 = 12 WHERE id = 4;
推荐答案
是的，这是可能的 - 您可以使用 INSERT ... ON DUPLICATE KEY UPDATE.
Yes, that's possible - you can use INSERT ... ON DUPLICATE KEY UPDATE.
使用您的示例:
INSERT INTO table (id,Col1,Col2) VALUES (1,1,1),(2,2,3),(3,9,3),(4,10,12)
ON DUPLICATE KEY UPDATE Col1=VALUES(Col1),Col2=VALUES(Col2);
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