重复键更新时插入始终更新所有值

Question

我正在尝试更新行或插入新行（如果存在）。如果有更新我只想用当前时间戳更新“更新”列，否则“添加”和“更新”得到相同的值（时间戳）

//1385982893 is from PHP with time() cause it's needed elsewhere too

INSERT INTO table (id, code, added, updated) VALUES (236, 'abcdefghi', 1385982893, 1385982893)
ON DUPLICATE KEY UPDATE
id = values(id), code = values(code), added = values(added),updated = 1385982893

ID是主键。代码是UNIQUE

问题是“添加”总是会使用当前时间戳（如更新的）更新

Answer 1

您只需要删除added = values(added)，它就不会更新：

INSERT INTO table (id, code, added, updated) VALUES (236, 'abcdefghi', 1385982893, 1385982893)
ON DUPLICATE KEY UPDATE
id = values(id), code = values(code),updated = 1385982893

Answer 2

然后不要在Update

中添加

INSERT INTO table (id, code, added, updated) VALUES (236, 'abcdefghi', 1385982893, 1385982893)
ON DUPLICATE KEY UPDATE
id = values(id), code = values(code), updated = 1385982893