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我有如下表：存储过程的性能选择SQL
CREATE TABLE [dbo].[_tbHRPro](
[ideID] [int] IDENTITY(-2147483648,1) NOT NULL,
[FID] [int] NULL,
[myDate] [datetime] NULL,
[myTime] [time](7) NULL,
[oValue] [decimal](18, 2) NULL,
[pValue] [decimal](18, 2) NULL,
CONSTRAINT [PK__tbHRPro] PRIMARY KEY CLUSTERED
(
[ideIDID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
然后，我有以下存储过程：
DECLARE @MonthID int = 2;
DECLARE @Year varchar(5) = '2014';
DECLARE @date1 DATE;
DECLARE @date2 DATE;
SET @date1 = DATEADD(DAY,-1,DATEADD(MONTH,1,CAST(CAST(@MonthID AS VARCHAR)+'/01/'+CAST(@Year AS VARCHAR)AS DATE)))
SET @date2 = CAST('01/01/'+CAST(@Year AS VARCHAR)AS DATE)
SELECT
a.ideID
, a.FID
, b.FC
, a.myDate
, a.myTime
, a.oValue
, a.pValue
INTO
#TEMPX
FROM
_tbHRPro a
INNER JOIN _FC b ON a.FID = b.FID
WHERE
myDate BETWEEN Dateadd(day, -1, @date2) AND dateadd(day, 1, @date1)
;WITH CTE AS
(
SELECT
T1.ideID
, T1.FID
, T1.FC
, T1.myDate
, T1.myTime
, T1.oValue
, CASE WHEN T1.oValue = 0 THEN 0 ELSE T1.oValue - T2.oValue END xValue
, T1.pValue
, CAST(T1.myDate AS datetime) + CAST(T1.myTime as datetime) oDateTime
, (CASE WHEN T1.oValue = 0 THEN 0 ELSE T1.oValue - T2.oValue END) - T1.pValue sDel
FROM
#TEMPX T1
LEFT JOIN #TEMPX T2 on T1.FID = T2.FID
AND DATEADD(HOUR, -1, CAST(T1.myDate AS datetime) + CAST(T1.myTime AS datetime)) = CAST(T2.myDate AS datetime) + CAST(T2.myTime AS datetime)
LEFT JOIN #TEMPX T3 on T1.FID = T3.FID
AND DATEADD(HOUR, 1, CAST(T1.myDate AS datetime) + CAST(T1.myTime AS datetime)) = CAST(T3.myDate AS datetime) + CAST(T3.myTime AS datetime)
)
, CTE2 AS
(
SELECT
T1.ideID
, T1.FID
, T1.FC
, T1.myDate
, T1.myTime
, T1.oValue
, CASE WHEN T1.oValue = 0 then (T2.xValue + T3.xValue)/2 ELSE T1.xValue END AS xValue
, T1.pValue
, (CASE WHEN T1.oValue = 0 then (T2.xValue + T3.xValue)/2 ELSE T1.xValue END) - T1.pValue sDel
FROM
CTE T1
LEFT JOIN CTE T2 ON T1.myDate = T2.myDate
AND T1.FID = T2.FID
AND DATEADD(HOUR, -1, T1.oDateTime)= T2.oDateTime
LEFT JOIN CTE T3 on T1.myDate = T3.myDate and T1.FID = T3.FID
AND DATEADD(HOUR, 1, T1.oDateTime)= T3.oDateTime
)
SELECT
ideID
, FID
, FC
, myDate
, myTime
, oValue
, xValue
, pValue
, sDel
INTO
#_vwHRPro
FROM
CTE2
ORDER BY
FC
, myDate
, myTime
;WITH ff AS
(
SELECT
FID
, FC
, DATEADD(hh, - 1, DATEADD(hh, DATEPART(hh, myTime), myDate)) AS newDate
, xValue
FROM
#_vwHRPro
)
SELECT
A.FID1
, A.FC1
, A.myDate1
, A.totxValue1
, B.FID2
, B.FC2
, B.myDate2
, B.totxValue2
, C.FID3
, C.FC3
, C.myDate3
, C.totxValue3
INTO
#_vwpm102
FROM
(
SELECT
FID AS FID1
, FC AS FC1
, CAST(newDate AS DATE) AS myDate1
, SUM(xValue) AS totxValue1
FROM
ff
WHERE
(FC LIKE '%1%')
GROUP BY
FID
, FC
, CAST(newDate AS DATE)
) AS A FULL OUTER JOIN
(
SELECT
FID AS FID2
, FC AS FC2
, CAST(newDate AS DATE) AS myDate2
, SUM(xValue) AS totxValue2
FROM
ff
WHERE
(FC LIKE '%2%')
GROUP BY
FID
, FC
, CAST(newDate AS DATE)
) AS B ON A.myDate1 = B.myDate2
FULL OUTER JOIN
(
SELECT
FID AS FID3
, FC AS FC3
, CAST(newDate AS DATE) AS myDate3
, SUM(xValue) AS totxValue3
FROM
ff
WHERE
(FC LIKE '%3%')
GROUP BY
FID
, FC
, CAST(newDate AS DATE)
) AS C ON A.myDate1 = C.myDate3
SELECT * FROM #_vwpm102 order by FC1, myDate1
我使用临时表，以减少数据的加载时间。数据量巨大，自2001年以来一直运行。
执行存储过程时的加载时间为32秒。
我试图从查询窗口运行，它也加载大约30秒。但是因为它存储在临时表中，所以我第二次运行。
我只需要选择下面的语句：
SELECT * FROM #_vwpm102 order by FC1, myDate1
它加载如此之快，只有1秒。
有没有人有一个想法如何最小化加载时间？至少少于10秒。
感谢您的帮助和想法。干杯，
尝试减少您的演员职业...因为你的mydate和我的时间等..你每次都施放..如果你不能改变基础表格，创建一个派生列。此外，在你的FC列上创建NC索引.. – Saravanan 2015-01-21 05:12:27
@Saravanan，它减少5秒。它现在加载了27秒。 – Haminteu 2015-01-21 06:19:42