我想向数据库表中添加一行,但如果存在具有相同唯一键的行,我想更新该行.
I want to add a row to a database table, but if a row exists with the same unique key I want to update the row.
例如:
INSERT INTO table_name (ID, NAME, AGE) VALUES(1, "A", 19);
假设唯一键是ID
,在我的数据库中,有一行ID = 1
.在这种情况下,我想用这些值更新该行.通常这会出错.
如果我使用 INSERT IGNORE
它会忽略错误,但它仍然不会更新.
Let’s say the unique key is ID
, and in my Database, there is a row with ID = 1
. In that case, I want to update that row with these values. Normally this gives an error.
If I use INSERT IGNORE
it will ignore the error, but it still won’t update.
使用 INSERT ... ON DUPLICATE KEY UPDATE
查询:
INSERT INTO table (id, name, age) VALUES(1, "A", 19) ON DUPLICATE KEY UPDATE
name="A", age=19
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