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这是我目前的代码，它的作用是：它将具有相同 ID（KEYVADD）的记录分组，然后根据有语句删除它们。

就目前而言，此查询需要 5-10 分钟才能运行，因为审计文件非常大，然后会加入和选择语句。我希望减少这个时间，但我正在努力以一种仍能返回相同结果的方式做到这一点。当我尝试将 HAVING 中的内容放入 WHERE 语句时，它只是在状态槽中提取带有空值的订单而不是时间，而不是一起摆脱 ID。 

DECLARE @paramdate DATETIME , @paramdatechar varchar(30),@warehouse int
set @warehouse = 711
set @paramdate= '2018-05-17 12:00:00.000'
set @paramdatechar = CONVERT(varchar(30),@paramdate,121)



exec('  select KEYVADD
    ,min(case when VALUADD=0 then timestmp else null end) as "Status0"
    ,min(case when VALUADD=2 then timestmp else null end) as "Status2"
    ,min(case when VALUADD=4 then timestmp else null end) as "Status4"
    ,min(case when VALUADD=5 then timestmp else null end) as "Status5"
    ,min(case when VALUADD=7 then timestmp else null end) as "Status7"
    ,min(case when VALUADD=8 then timestmp else null end) as "Status8"
    ,min(case when VALUADD=9 then timestmp else null end) as "Status9"
    ,min(nmdoh) as "Customer"
    ,min(c.scscn) as "Container"
    ,min(whsoh) as "Warehouse"
    ,min(preoh) as "Preorder"
    from Audit a
left outer join orderhp h on left(a.KEYVADD,7) = h.ONHOH
left outer join ordercnhpc on h.onhoh = c.onhcn
WHERE 
    whsoh = '''+@warehouse+'''
    and IMGTADD = ''A''
GROUP BY KEYVADD
HAVING(
     (min(case when VALUADD=2 then timestmp else null end) <= '''+ @paramdatechar +''')
        and (
                (
                min(preoh) = ''Y''
                and(  
                    (min(case when VALUADD=4 then timestmp else null end) IS NOT NULL)
                    or   (min(case when VALUADD=5 then timestmp else null end) IS NOT NULL)
                    or   (min(case when VALUADD=7 then timestmp else null end) IS NOT NULL)
                    or   (min(case when VALUADD=8 then timestmp else null end) IS NOT NULL)
                    or   (min(case when VALUADD=9 then timestmp else null end) IS NOT NULL)
                    )
                )
                or
                (
                min(preoh) = ''N''
                )
            )
        and(
                (
                    min(case when VALUADD=7 then timestmp else null end) IS NULL
                    and  min(case when VALUADD=8 then timestmp else null end) IS NULL
                    and  min(case when VALUADD=9 then timestmp else null end) IS NULL
                )
                or
                (
                    min(case when VALUADD=7 then timestmp else null end) >= '''+ @paramdatechar +'''
                    or   min(case when VALUADD=8 then timestmp else null end) >= '''+ @paramdatechar +'''
                    or   min(case when VALUADD=9 then timestmp else null end) >= '''+ @paramdatechar +'''
                )
            )
        ) ') at IBMAS400

结果：

    793841800 2018-05-16 14:46:24.5720000   2018-05-16 13:20:25.2250000 2018-05-16 14:46:36.8530000 NULL    NULL    2018-05-17 13:57:03.0230000 NULL    name 1                  711 N
    793843700 2018-05-16 14:46:24.6410000   2018-05-16 13:20:27.2830000 2018-05-16 14:46:36.8750000 NULL    NULL    2018-05-17 13:57:03.5800000 NULL    name 2                      711 N
    793847800 2018-05-16 14:46:24.7080000   2018-05-16 14:21:21.8600000 2018-05-16 14:46:36.9820000 NULL    NULL    2018-05-17 13:57:04.0010000 NULL    name 3                  711 N
    793849100 2018-05-16 14:46:24.7400000   2018-05-16 14:21:23.5210000 2018-05-16 14:46:37.0430000 NULL    NULL    2018-05-17 13:57:04.3380000 NULL    name 4                      711 N
    793855500 2018-05-16 15:49:01.7590000   2018-05-16 15:21:18.1300000 2018-05-16 15:49:15.5260000 NULL    NULL    2018-05-17 13:57:05.0660000 NULL    name 5                  711 N
    793856100 2018-05-16 15:49:01.7810000   2018-05-16 15:21:19.2200000 2018-05-16 15:49:15.5520000 NULL    NULL    2018-05-17 13:57:05.5630000 NULL    name 6                  711 N
    793865100 2018-05-16 19:54:46.2840000   2018-05-16 16:19:53.7890000 2018-05-16 19:54:57.1080000 NULL    NULL    2018-05-17 13:57:05.9330000 NULL    name 7                      711 N
    793871500 2018-05-16 19:54:46.3350000   2018-05-16 17:20:24.8500000 2018-05-16 19:54:57.1820000 NULL    NULL    2018-05-17 14:07:04.8690000 NULL    name 8                  711 N

我希望有一种方法可以通过更改选择的工作方式或其他方式来减少时间，任何帮助将不胜感激！

4

1 回答 1

1

https://www.red-gate.com/simple-talk/sql/learn-sql-server/sql-server-index-basics/

你可以试试这个，看看它是否更快？另外，如果您在选择中注释掉 c.scscn 字段，为什么还需要加入 ordercnhp 表？

--,min(c.scscn) 作为“容器”

DECLARE @paramdate DATETIME , @paramdatechar varchar(30),@warehouse int
set @warehouse = 711
set @paramdate= '2018-05-17 12:00:00.000'
set @paramdatechar = CONVERT(varchar(30),@paramdate,121)



exec('  select KEYVADD
    ,min(case when VALUADD=0 then timestmp else null end) as "Status0"
    ,min(case when VALUADD=2 then timestmp else null end) as "Status2"
    ,min(case when VALUADD=4 then timestmp else null end) as "Status4"
    ,min(case when VALUADD=5 then timestmp else null end) as "Status5"
    ,min(case when VALUADD=7 then timestmp else null end) as "Status7"
    ,min(case when VALUADD=8 then timestmp else null end) as "Status8"
    ,min(case when VALUADD=9 then timestmp else null end) as "Status9"
    ,min(nmdoh) as "Customer"
    --,min(c.scscn) as "Container"
    ,min(whsoh) as "Warehouse"
    ,min(preoh) as "Preorder"
    from Audit a
left outer join orderhp h on left(a.KEYVADD,7) = h.ONHOH
-- Is the ordercnhp needed?
--left outer join ordercnhp c on h.onhoh = c.onhcn
WHERE 
    whsoh = '''+@warehouse+'''
    and IMGTADD = ''A''
GROUP BY KEYVADD
HAVING(
     (min(case when VALUADD=2 then timestmp else null end) <= '''+ @paramdatechar +''')
        and (
                (
                    min(preoh) = ''N''
                )
                or
                (
                    min(preoh) = ''Y''
                    and(  
                            (min(case when VALUADD in (4,5,7,8,9) then timestmp else null end) IS NOT NULL)
                        )
                )
            )
        and(
                (
                    min(case when VALUADD in (7,8,9) then timestmp else null end) IS NULL
                )
                or
                (
                    min(case when VALUADD in (7,8,9) then timestmp else null end) >= '''+ @paramdatechar +'''
                )
            )
        ) ') at IBMAS400
于 2018-05-18T18:21:59.690 回答