小编eh_*_*ver的帖子

我正在尝试更新Time_Stamp表格中的字段simple_pack_data,以匹配表格中类似标题字段中的值temp_data.每个表有三个字段Test_Number和Time_Marker,我使用到INNER JOIN表.Time_Marker就像一个读数,Time_Stamp从测试开始的实际时间.

我想一次更新Time_Stamp一个测试,所以我一直在尝试的代码是:

UPDATE simple_pack_data s
INNER JOIN (
    SELECT *
    FROM temp_data t
    WHERE t.Test = "3"
    ) AS tmp
ON s.Test_Number = tmp.Test_Number AND s.Time_Marker = tmp.Time_Marker
SET s.Time_Stamp = tmp.Time_Stamp
WHERE s.Test_Number = "3";

当我运行它需要超过50秒,我得到1205错误.如果我运行类似结构的select语句:

SELECT *
FROM simple_pack_data s
INNER JOIN (
    SELECT *
    FROM temp_data t
    WHERE t.Test = "3"
    ) AS tmp
ON s.Test_Number = tmp.Test …