Question

我是新人，非常感谢帮助!!如果一个或多个＆＃34; ID＆＃34;需要删除行。缺少时间戳。例如，在下表中，ID = 10没有IRIG_Time = 2014-05-15 09：05：00.000的值，因此我需要删除该时间戳的所有IRIG_Time行。我使用以下查询来提取数据（感谢Barmar到目前为止的帮助！）。

CREATE TABLE Table1 
SELECT * 
FROM originaltable  Where IRIG_Time between  '2014/05/15 09:05' and '2014/05/15 09:35';
DELETE t.* FROM Table1 AS t
JOIN (
SELECT IRIG_Time
FROM Table1
GROUP BY IRIG_Time
HAVING COUNT(*) != 5
) AS t1 ON t.IRIG_TIME = t1.IRIG_TIME;
select * from Table1; 


IRIG_Time                   ID      MagnitudeA
2014-05-15 09:05:00.000     5       730406000
2014-05-15 09:05:00.000     15      742456000
2014-05-15 09:05:00.000     20      731190000
2014-05-15 09:05:00.000     25      748572000
2014-05-15 09:05:00.033     5       730343000
2014-05-15 09:05:00.033     10      755865000
2014-05-15 09:05:00.033     15      742347000
2014-05-15 09:05:00.033     20      731168000
2014-05-15 09:05:00.033     25      748574000
2014-05-15 09:05:00.067     5       730420000
2014-05-15 09:05:00.067     10      755767000
2014-05-15 09:05:00.067     15      742310000
2014-05-15 09:05:00.067     20      731176000
2014-05-15 09:05:00.067     25      748524000

当使用上面的代码时，我得到错误代码：1175您正在使用安全更新模式，并且您尝试更新没有使用KEY列的WHERE的表要禁用安全模式，请在Preferences - ＆gt;中切换选项。 SQL查询并重新连接。

Answer 1

DELETE t.* FROM table AS t
JOIN (
    SELECT IRIG_Time
    FROM table
    GROUP BY IRIG_Time
    HAVING COUNT(*) != (SELECT COUNT(DISTINCT ID) FROM table)
    ) AS t1 ON t.IRIG_TIME = t1.IRIG_TIME

DEMO

Answer 2

感谢巴马的帮助！我不得不修改＆＃34;安全更新＆＃34;首选项，但以下脚本有效！

Drop table Table1;
CREATE TABLE Table1
SELECT IRIG_Time, ID, MagnitudeA FROM originaltable 
Where IRIG_Time between '2014-05-25 13:00' and '2014-05-25 14:00' order by IRIG_Time;

DELETE t.* FROM Table1 AS t
JOIN (
SELECT IRIG_Time, ID
FROM Table1
GROUP BY IRIG_Time
HAVING COUNT(*) != 5
) AS t1 ON t.IRIG_TIME = t1.IRIG_TIME;
select * from Table1;

过滤MySQL时间戳

2 个答案: