Question

好的，我有这个查询正在创建一个新列（总计），它是StartDateTime和EndDateTime之间的时间跨度（以分钟为单位）。我真正想做的不是返回这几个数字，而只返回这几个数字的总和。（基本上查询将返回一个数字，即“总计”列的总和）。请参阅下面的快照，我也将查询放在这里供您修改。谢谢！

SELECT     ID, StartDateTime, EndDateTime, DATEDIFF(mi, StartDateTime, EndDateTime) AS Total
FROM         tEvent
WHERE     (EventDefinitionID = '1427' OR
                      EventDefinitionID = '1428' OR
                      EventDefinitionID = '1429' OR
                      EventDefinitionID = '1430' OR
                      EventDefinitionID = '1432' OR
                      EventDefinitionID = '1434' OR
                      EventDefinitionID = '1435' OR
                      EventDefinitionID = '1436' OR
                      EventDefinitionID = '1437' OR
                      EventDefinitionID = '1438' OR
                      EventDefinitionID = '1439' OR
                      EventDefinitionID = '1440' OR
                      EventDefinitionID = '1441' OR
                      EventDefinitionID = '1442' OR
                      EventDefinitionID = '1443' OR
                      EventDefinitionID = '1444' OR
                      EventDefinitionID = '1445' OR
                      EventDefinitionID = '1446') AND (EndDateTime IS NOT NULL) AND (DAY(StartDateTime) = DAY(GETDATE()))
ORDER BY StartDateTime DESC

enter image description here

Answer 1

如果我正确理解了这个问题，只需将您的查询更改为以下内容，即只计算一个数字，即所有总数的总计。稍微简化并重新格式化，这是查询：

SELECT     SUM(DATEDIFF(mi, StartDateTime, EndDateTime)) AS GrandTotal 
FROM       tEvent 
WHERE     (EventDefinitionID IN ('1427','1428','1429','1430','1432','1434',
                                 '1435','1436','1437','1438','1439','1440',
                                 '1441','1442','1443','1444','1445'))
       AND EndDateTime IS NOT NULL
       AND DAY(StartDateTime) = DAY(GETDATE())

如果您的EventDefinitionID是数字，则可以使用BETWEEN使查询更具可读性：

SELECT     SUM(DATEDIFF(mi, StartDateTime, EndDateTime)) AS GrandTotal 
FROM       tEvent 
WHERE     (EventDefinitionID BETWEEN 1427 AND 1430
        OR EventDefinitionID = 1432
        OR EventDefinitionID BETWEEN 1434 AND 1445)
       AND EndDateTime IS NOT NULL
       AND DAY(StartDateTime) = DAY(GETDATE())

Answer 2

试

SELECT     SUM(DATEDIFF(mi, StartDateTime, EndDateTime)) AS Total
FROM         tEvent
WHERE     (EventDefinitionID = '1427' OR
                      EventDefinitionID = '1428' OR
                      EventDefinitionID = '1429' OR
                      EventDefinitionID = '1430' OR
                      EventDefinitionID = '1432' OR
                      EventDefinitionID = '1434' OR
                      EventDefinitionID = '1435' OR
                      EventDefinitionID = '1436' OR
                      EventDefinitionID = '1437' OR
                      EventDefinitionID = '1438' OR
                      EventDefinitionID = '1439' OR
                      EventDefinitionID = '1440' OR
                      EventDefinitionID = '1441' OR
                      EventDefinitionID = '1442' OR
                      EventDefinitionID = '1443' OR
                      EventDefinitionID = '1444' OR
                      EventDefinitionID = '1445' OR
                      EventDefinitionID = '1446') AND (EndDateTime IS NOT NULL) AND (DAY(StartDateTime) = DAY(GETDATE()))

返回子查询中列的值的总和

2 个答案: