Mysql 需要根据顶行结果设置所有行的值
我需要选择最上面的一行,l1.activityId=t2.activityId,然后我需要能够将.scheduleType的所有行设置为等于“error”,而不仅仅是上述为真的行。目前,我可以根据l1.activityId=t2.activityId的每行结果获得要更改的值,但这对我需要的所有结果都没有帮助Mysql 需要根据顶行结果设置所有行的值,mysql,Mysql,我需要选择最上面的一行,l1.activityId=t2.activityId,然后我需要能够将.scheduleType的所有行设置为等于“error”,而不仅仅是上述为真的行。目前,我可以根据l1.activityId=t2.activityId的每行结果获得要更改的值,但这对我需要的所有结果都没有帮助 CREATE PROCEDURE reportFreeCoolingTrackerNoErrors ( IN fromDate varchar (50), I
CREATE PROCEDURE reportFreeCoolingTrackerNoErrors (
IN fromDate varchar (50),
IN toDate varchar (50),
IN timeZone varchar (50))
BEGIN
DECLARE startDate varchar (50);
DECLARE endDate varchar (50);
DECLARE mylogID Int;
SET startDate = FROM_UNIXTIME(fromDate/1000);
SET endDate = FROM_UNIXTIME(toDate/1000);
SELECT
l1.item31985,l1.item31987,a.scheduleType,
((l1.item31985 - l1.item31987)*(time_to_sec(timediff(t2.completed, l1.completed)))) / 3600 AS kwDifference,
((l1.item31985 - l1.item31987) * (substr(l.details, instr(l.details , ':' ) +1))) AS cost,
(((l1.item31985 - l1.item31987) * (substr(l.details, instr(l.details , ':' ) +1)))
*(time_to_sec(timediff(t2.completed, l1.completed)) / 3600)) AS costT,
time_to_sec(timediff(t2.completed, l1.completed)) / 3600 AS coolingHours,
time_to_sec(timediff(endDate, startDate)) / 3600 AS totalTimeRange,
(CONVERT_TZ( (FROM_UNIXTIME(fromDate/1000)),'UTC', timeZone) )AS startingDate,
(CONVERT_TZ( (FROM_UNIXTIME(toDate/1000)),'UTC', timeZone) ) AS endingDate,DATABASE() AS databaseName,
CASE
when l1.activityId = t2.activityId THEN 1
ELSE 0
END AS errorCheck
FROM logs l
INNER JOIN groups g ON g.groupId = l.groupId
LEFT JOIN groups g1 ON g.parentId = g1.groupId
LEFT JOIN groups g2 ON g1.parentId = g2.groupId
LEFT JOIN groups g3 ON g2.parentId = g3.groupId
INNER JOIN activities a ON l.logId = a.logId
INNER JOIN log1644 l1 ON a.activityId = l1.activityId
INNER JOIN log1644 t2 ON t2.recordId = l1.recordid + 1
INNER JOIN items i ON l.logId = i.logId AND i.name LIKE '%KW%'
INNER JOIN users u ON l1.userId = u.userId AND i.name LIKE '%KW%'
WHERE i.itemID = "31985" AND l1.activityId = 1257
AND l1.started
BETWEEN startDate
AND endDate
ORDER BY l1.recordId,l1.started;
END //
DELIMITER ;
要选择顶行,请仅选择降序数据集中的第一行:
SELECT <fields>
FROM TABLE
ORDER BY <your field> DESC
LIMIT 1 ;
选择
从桌子上
按说明订购
限值1;
由于您是在存储过程中执行此操作的,因此可以将.scheduleType选择到变量中,然后在where子句中使用该变量执行select。您不能使用两个查询来实现它吗?我不确定如何执行此操作。我尝试了很多不同的选择!这将选择顶行-我想选择所有行,但根据顶行返回的内容,我需要将所有行a.schedule type设置为Error,因为您在存储过程中执行此操作,可以通过两个步骤完成此操作:首先-可以使用查询将.scheduleType选择到变量中,然后在where子句中使用该变量执行select。