Question

我有两个表，我想将当前行从该表更新到主表，我是一个DBA，所以对我来说，我最终会写一个大循环，所以想着是否有人可以帮助我。所以基本上我想从表1中更新表2的值（latestTimestamp和count），表2中的catch应该从表1的最新计数中增加，如果表2计数为48且表1的最新计数为1则应该添加1到48，表2中的值应为49，表1中包含最新时间戳。我希望我有意义。

以下是数据

表1（表名）

Column > DBName  Proc Name               CTimeStmp                Count   LatestTimeStmp       Calls

Data >
DB_US,  upGetSelfServiceHelp,   2011-02-10 11:37:22.490,      48,   2013-06-17 07:21:41.480,      0
DB_US,  upGetSelfServiceHelp,   2011-02-10 11:37:22.490,      1,    2013-06-17 14:18:33.997,      0

表2（表名）

Column > DBName  Proc Name               CTimeStmp                Count   LatestTimeStmp       Calls

Data >
DB_US   upGetSelfServiceHelp    2011-02-10 11:37:22.490   48    2013-06-17 07:21:41.480   0

Answer 1

这能满足您的需求吗？

update [Table 2] set
    [LatestTimeStmp] = (select max([LatestTimeStmp]) from [Table 1] t1 where t1.DBName = t2.DBName and t1.ProcName = t2.ProcName),
    [Count] = (select sum([Count]) from [Table 1] t1 where t1.DBName = t2.DBName and t1.ProcName = t2.ProcName)
from
    [Table 2] t2

或者如果子查询的重复你错了，这也是一样的：

update [Table 2] set
    LatestTimeStmp = t1.LatestTimeStmp,
    [Count] = t1.Count
from
    [Table 2] t2
    join (
        select
            DBName,
            ProcName,
            max(LatestTimeStmp) LatestTimeStmp,
            sum(Count) [Count]
        from
            [Table 1]
        group by
            DBName,
            ProcName
        ) t1 on t1.DBName = t2.DBName and t1.ProcName = t2.ProcName

在增加主值时更新表值

1 个答案: