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我試圖計算end_datetime和start_datetime表統計的不同行之間的時間差,並導致pause_time設置。如何計算一個表中不同行和列之間的timestampdiff?
我這樣的查詢沒有執行。
update statistic
set pause_time = TIMESTAMPDIFF(hour, a.start_datetime, b.end_datetime)
from statistic a
inner join statistic b on a.id = (b.id - 1)
order by a.id asc
我收到一個錯誤:
check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM statistic a INNER JOIN statistic b ON b.id=(a.id - 1) ORDER BY a.id ASC' at line 1 QMYSQL. My table statistic:
<html> <head> <title></title> </head> <body> <div> id<span class="Apple-tab-span" style="white-space:pre"> </span> | start_datetime<span class="Apple-tab-span" style="white-space:pre"> </span> | end_datetime<span class="Apple-tab-span" style="white-space:pre"> </span> | pause_time</div> <p> <span style="font-size:12px;">1 <span class="Apple-tab-span" style="white-space:pre"> </span> | 2016-10-13T23:14:05<span class="Apple-tab-span" style="white-space:pre"> </span> | <strong><span style="color:#f00;"> 2016-10-14T07:03:02</span> <span class="Apple-tab-span" style="white-space:pre"> </span></strong>| </span></p> <p> <span style="font-size:12px;">2<span class="Apple-tab-span" style="white-space:pre"> </span> | <span style="color:#f00;"><strong> 2016-10-14T15:25:56 </strong> </span>| 2016-10-14T22:03:50<span class="Apple-tab-span" style="white-space:pre"> </span> |</span></p> <p> <span style="font-size:12px;">3 <span class="Apple-tab-span" style="white-space:pre"> </span>| 2016-10-13T15:25:30<span class="Apple-tab-span" style="white-space:pre"> </span> | 2016-10-13T22:10:01 |</span></p> <p> <span style="font-size:12px;">4 <span class="Apple-tab-span" style="white-space:pre"> </span>| 2016-10-13T01:09:11<span class="Apple-tab-span" style="white-space:pre"> </span> | 2016-10-13T02:59:30<span class="Apple-tab-span" style="white-space:pre"> </span> |</span></p> <div> </div> </body> </html>
UPDATE統計量的JOIN統計B關於b.id =(a.id + 1) SET b.pause_time = TIMESTAMPDIFF (SECOND,a.end_datetime,b.start_datetime) – VAP