Question

我对TSQL和存储过程非常陌生

TSQL和存储过程都使用定义的变量。 TSQL需要19秒才能获得结果，但存储过程大约需要8分钟

存储过程以获取当月每天的安全价格。如果是周末，则使用最后工作日的价格。

存储过程代码：

SET NOCOUNT ON
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[SP_SEC_PRICES_FOR_SKP] @sett_date datetime as

SELECT A.SECID, A.PRODTYPE, A.CCY, B1.D1, B2.D2,B3.D3,B4.D4, B5.D5,B6.D6,B7.D7,B8.D8,B9.D9,B10.D10,  
B11.D11,B12.D12,B13.D13,B14.D14,B15.D15,B16.D16,B17.D17,B18.D18,B19.D19,B20.D20,  
B21.D21,B22.D22,B23.D23,B24.D24,B25.D25,B26.D26,B27.D27,B28.D28,B29.D29,B30.D30,  
B31.D31,
@sett_date, @sett_date+4, @sett_date+30 FROM SECM A

LEFT JOIN (SELECT SECID, (CLPRICE_8)D1 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date) = 'Saturday' then (@sett_date-1)
                                 when DATENAME (dw, @sett_date) = 'Sunday' then (@sett_date-2)
                                 else @sett_date end) B1
ON A.SECID = B1.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D2 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+1) = 'Saturday' then ((@sett_date+1)-1)
                                 when DATENAME (dw, @sett_date+1) = 'Sunday' then ((@sett_date+1)-2)
                                 else @sett_date+1 end) B2
ON A.SECID = B2.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D3 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+2) = 'Saturday' then ((@sett_date+2)-1)
                                 when DATENAME (dw, @sett_date+2) = 'Sunday' then ((@sett_date+2)-2)
                                 else @sett_date+2 end) B3
ON A.SECID = B3.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D4 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+3) = 'Saturday' then ((@sett_date+3)-1)
                                 when DATENAME (dw, @sett_date+3) = 'Sunday' then ((@sett_date+3)-2)
                                 else @sett_date+3 end) B4
ON A.SECID = B4.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D5 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+4) = 'Saturday' then ((@sett_date+4)-1)
                                 when DATENAME (dw, @sett_date+4) = 'Sunday' then ((@sett_date+4)-2)
                                 else @sett_date+4 end) B5
ON A.SECID = B5.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D6 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+5) = 'Saturday' then ((@sett_date+5)-1)
                                 when DATENAME (dw, @sett_date+5) = 'Sunday' then ((@sett_date+5)-2)
                                 else @sett_date+5 end) B6
ON A.SECID = B6.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D7 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+6) = 'Saturday' then ((@sett_date+6)-1)
                                 when DATENAME (dw, @sett_date+6) = 'Sunday' then ((@sett_date+6)-2)
                                 else @sett_date+6 end) B7
ON A.SECID = B7.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D8 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+7) = 'Saturday' then ((@sett_date+7)-1)
                                 when DATENAME (dw, @sett_date+7) = 'Sunday' then ((@sett_date+7)-2)
                                 else @sett_date+7 end) B8
ON A.SECID = B8.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D9 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+8) = 'Saturday' then ((@sett_date+8)-1)
                                 when DATENAME (dw, @sett_date+8) = 'Sunday' then ((@sett_date+8)-2)
                                 else @sett_date+8 end) B9
ON A.SECID = B9.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D10 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+9) = 'Saturday' then ((@sett_date+9)-1)
                                 when DATENAME (dw, @sett_date+9) = 'Sunday' then ((@sett_date+9)-2)
                                 else @sett_date+9 end) B10
ON A.SECID = B10.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D11 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+10) = 'Saturday' then ((@sett_date+10)-1)
                                 when DATENAME (dw, @sett_date+10) = 'Sunday' then ((@sett_date+10)-2)
                                 else @sett_date+10 end) B11
ON A.SECID = B11.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D12 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+11) = 'Saturday' then ((@sett_date+11)-1)
                                 when DATENAME (dw, @sett_date+11) = 'Sunday' then ((@sett_date+11)-2)
                                else @sett_date+11 end) B12
ON A.SECID = B12.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D13 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+12) = 'Saturday' then ((@sett_date+12)-1)
                                 when DATENAME (dw, @sett_date+12) = 'Sunday' then ((@sett_date+12)-2)
                                 else @sett_date+12 end) B13
ON A.SECID = B13.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D14 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+13) = 'Saturday' then ((@sett_date+13)-1)
                                 when DATENAME (dw, @sett_date+13) = 'Sunday' then ((@sett_date+13)-2)
                                 else @sett_date+13 end) B14
ON A.SECID = B14.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D15 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+14) = 'Saturday' then ((@sett_date+14)-1)
                                 when DATENAME (dw, @sett_date+14) = 'Sunday' then ((@sett_date+14)-2)
                                 else @sett_date+14 end) B15
ON A.SECID = B15.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D16 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+15) = 'Saturday' then ((@sett_date+15)-1)
                                 when DATENAME (dw, @sett_date+15) = 'Sunday' then ((@sett_date+15)-2)
                                 else @sett_date+15 end) B16
ON A.SECID = B16.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D17 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+16) = 'Saturday' then ((@sett_date+16)-1)
                                 when DATENAME (dw, @sett_date+16) = 'Sunday' then ((@sett_date+16)-2)
                                 else @sett_date+16 end) B17
ON A.SECID = B17.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D18 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+17) = 'Saturday' then ((@sett_date+17)-1)
                                 when DATENAME (dw, @sett_date+17) = 'Sunday' then ((@sett_date+17)-2)
                                 else @sett_date+17 end) B18
ON A.SECID = B18.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D19 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+18) = 'Saturday' then ((@sett_date+18)-1)
                                 when DATENAME (dw, @sett_date+18) = 'Sunday' then ((@sett_date+18)-2)
                                 else @sett_date+18 end) B19
ON A.SECID = B19.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D20 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+19) = 'Saturday' then ((@sett_date+19)-1)
                                 when DATENAME (dw, @sett_date+19) = 'Sunday' then ((@sett_date+19)-2)
                                 else @sett_date+19 end) B20
ON A.SECID = B20.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D21 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+20) = 'Saturday' then ((@sett_date+20)-1)
                                 when DATENAME (dw, @sett_date+20) = 'Sunday' then ((@sett_date+20)-2)
                                 else @sett_date+20 end) B21
ON A.SECID = B21.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D22 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+21) = 'Saturday' then ((@sett_date+21)-1)
                                 when DATENAME (dw, @sett_date+21) = 'Sunday' then ((@sett_date+21)-2)
                                 else @sett_date+21 end) B22
ON A.SECID = B22.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D23 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+22) = 'Saturday' then ((@sett_date+22)-1)
                                 when DATENAME (dw, @sett_date+22) = 'Sunday' then ((@sett_date+22)-2)
                                 else @sett_date+22 end) B23
ON A.SECID = B23.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D24 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+23) = 'Saturday' then ((@sett_date+23)-1)
                                 when DATENAME (dw, @sett_date+23) = 'Sunday' then ((@sett_date+23)-2)
                                 else @sett_date+23 end) B24
ON A.SECID = B24.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D25 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+24) = 'Saturday' then ((@sett_date+24)-1)
                                 when DATENAME (dw, @sett_date+24) = 'Sunday' then ((@sett_date+24)-2)
                                 else @sett_date+24 end) B25
ON A.SECID = B25.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D26 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+25) = 'Saturday' then ((@sett_date+25)-1)
                                 when DATENAME (dw, @sett_date+25) = 'Sunday' then ((@sett_date+25)-2)
                                 else @sett_date+25 end) B26
ON A.SECID = B26.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D27 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+26) = 'Saturday' then ((@sett_date+26)-1)
                                 when DATENAME (dw, @sett_date+26) = 'Sunday' then ((@sett_date+26)-2)
                                 else @sett_date+26 end) B27
ON A.SECID = B27.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D28 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+27) = 'Saturday' then ((@sett_date+27)-1)
                                 when DATENAME (dw, @sett_date+27) = 'Sunday' then ((@sett_date+27)-2)
                                 else @sett_date+27 end) B28
ON A.SECID = B28.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D29 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+28) = 'Saturday' then ((@sett_date+28)-1)
                                 when DATENAME (dw, @sett_date+28) = 'Sunday' then ((@sett_date+28)-2)
                                 else @sett_date+28 end) B29
ON A.SECID = B29.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D30 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+29) = 'Saturday' then ((@sett_date+29)-1)
                                 when DATENAME (dw, @sett_date+29) = 'Sunday' then ((@sett_date+29)-2)
                                 else @sett_date+29 end) B30
ON A.SECID = B30.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D31 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+30) = 'Saturday' then ((@sett_date+30)-1)
                                 when DATENAME (dw, @sett_date+30) = 'Sunday' then ((@sett_date+30)-2)
                                 else @sett_date+30 end) B31
ON A.SECID = B31.SECID

SET NOCOUNT OFF

T-SQL查询代码：

SET NOCOUNT ON

DECLARE @sett_date DateTime

set @sett_date = '20140101'

SELECT A.SECID, A.PRODTYPE, A.CCY, B1.D1, B2.D2,B3.D3,B4.D4, B5.D5,B6.D6,B7.D7,B8.D8,B9.D9,B10.D10,  
B11.D11,B12.D12,B13.D13,B14.D14,B15.D15,B16.D16,B17.D17,B18.D18,B19.D19,B20.D20,  
B21.D21,B22.D22,B23.D23,B24.D24,B25.D25,B26.D26,B27.D27,B28.D28,B29.D29,B30.D30,  
B31.D31,
@sett_date, @sett_date+4, @sett_date+30 FROM SECM A

LEFT JOIN (SELECT SECID, (CLPRICE_8)D1 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date) = 'Saturday' then (@sett_date-1)
                                 when DATENAME (dw, @sett_date) = 'Sunday' then (@sett_date-2)
                                 else @sett_date end) B1
ON A.SECID = B1.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D2 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+1) = 'Saturday' then ((@sett_date+1)-1)
                                 when DATENAME (dw, @sett_date+1) = 'Sunday' then ((@sett_date+1)-2)
                                 else @sett_date+1 end) B2
ON A.SECID = B2.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D3 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+2) = 'Saturday' then ((@sett_date+2)-1)
                                 when DATENAME (dw, @sett_date+2) = 'Sunday' then ((@sett_date+2)-2)
                                 else @sett_date+2 end) B3
ON A.SECID = B3.SECID

----------------------------

LEFT JOIN (SELECT SECID, (CLPRICE_8)D4 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+3) = 'Saturday' then ((@sett_date+3)-1)
                                 when DATENAME (dw, @sett_date+3) = 'Sunday' then ((@sett_date+3)-2)
                                 else @sett_date+3 end) B4
ON A.SECID = B4.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D5 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+4) = 'Saturday' then ((@sett_date+4)-1)
                                 when DATENAME (dw, @sett_date+4) = 'Sunday' then ((@sett_date+4)-2)
                                 else @sett_date+4 end) B5
ON A.SECID = B5.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D6 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+5) = 'Saturday' then ((@sett_date+5)-1)
                                 when DATENAME (dw, @sett_date+5) = 'Sunday' then ((@sett_date+5)-2)
                                 else @sett_date+5 end) B6
ON A.SECID = B6.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D7 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+6) = 'Saturday' then ((@sett_date+6)-1)
                                 when DATENAME (dw, @sett_date+6) = 'Sunday' then ((@sett_date+6)-2)
                                 else @sett_date+6 end) B7
ON A.SECID = B7.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D8 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+7) = 'Saturday' then ((@sett_date+7)-1)
                                 when DATENAME (dw, @sett_date+7) = 'Sunday' then ((@sett_date+7)-2)
                                 else @sett_date+7 end) B8
ON A.SECID = B8.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D9 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+8) = 'Saturday' then ((@sett_date+8)-1)
                                 when DATENAME (dw, @sett_date+8) = 'Sunday' then ((@sett_date+8)-2)
                                 else @sett_date+8 end) B9
ON A.SECID = B9.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D10 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+9) = 'Saturday' then ((@sett_date+9)-1)
                                 when DATENAME (dw, @sett_date+9) = 'Sunday' then ((@sett_date+9)-2)
                                 else @sett_date+9 end) B10
ON A.SECID = B10.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D11 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+10) = 'Saturday' then ((@sett_date+10)-1)
                                 when DATENAME (dw, @sett_date+10) = 'Sunday' then ((@sett_date+10)-2)
                                 else @sett_date+10 end) B11
ON A.SECID = B11.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D12 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+11) = 'Saturday' then ((@sett_date+11)-1)
                                 when DATENAME (dw, @sett_date+11) = 'Sunday' then ((@sett_date+11)-2)
                                 else @sett_date+11 end) B12
ON A.SECID = B12.SECID



LEFT JOIN (SELECT SECID, (CLPRICE_8)D13 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+12) = 'Saturday' then ((@sett_date+12)-1)
                                 when DATENAME (dw, @sett_date+12) = 'Sunday' then ((@sett_date+12)-2)
                                 else @sett_date+12 end) B13
ON A.SECID = B13.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D14 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+13) = 'Saturday' then ((@sett_date+13)-1)
                                 when DATENAME (dw, @sett_date+13) = 'Sunday' then ((@sett_date+13)-2)
                                 else @sett_date+13 end) B14
ON A.SECID = B14.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D15 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+14) = 'Saturday' then ((@sett_date+14)-1)
                                 when DATENAME (dw, @sett_date+14) = 'Sunday' then ((@sett_date+14)-2)
                                 else @sett_date+14 end) B15
ON A.SECID = B15.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D16 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+15) = 'Saturday' then ((@sett_date+15)-1)
                                 when DATENAME (dw, @sett_date+15) = 'Sunday' then ((@sett_date+15)-2)
                                 else @sett_date+15 end) B16
ON A.SECID = B16.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D17 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+16) = 'Saturday' then ((@sett_date+16)-1)
                                 when DATENAME (dw, @sett_date+16) = 'Sunday' then ((@sett_date+16)-2)
                                 else @sett_date+16 end) B17
ON A.SECID = B17.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D18 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+17) = 'Saturday' then ((@sett_date+17)-1)
                                 when DATENAME (dw, @sett_date+17) = 'Sunday' then ((@sett_date+17)-2)
                                 else @sett_date+17 end) B18
ON A.SECID = B18.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D19 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+18) = 'Saturday' then ((@sett_date+18)-1)
                                 when DATENAME (dw, @sett_date+18) = 'Sunday' then ((@sett_date+18)-2)
                                 else @sett_date+18 end) B19
ON A.SECID = B19.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D20 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+19) = 'Saturday' then ((@sett_date+19)-1)
                                 when DATENAME (dw, @sett_date+19) = 'Sunday' then ((@sett_date+19)-2)
                                 else @sett_date+19 end) B20
ON A.SECID = B20.SECID


---------------------------------


LEFT JOIN (SELECT SECID, (CLPRICE_8)D21 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+20) = 'Saturday' then ((@sett_date+20)-1)
                                 when DATENAME (dw, @sett_date+20) = 'Sunday' then ((@sett_date+20)-2)
                                 else @sett_date+20 end) B21
ON A.SECID = B21.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D22 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+21) = 'Saturday' then ((@sett_date+21)-1)
                                 when DATENAME (dw, @sett_date+21) = 'Sunday' then ((@sett_date+21)-2)
                                 else @sett_date+21 end) B22
ON A.SECID = B22.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D23 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+22) = 'Saturday' then ((@sett_date+22)-1)
                                 when DATENAME (dw, @sett_date+22) = 'Sunday' then ((@sett_date+22)-2)
                                 else @sett_date+22 end) B23
ON A.SECID = B23.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D24 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+23) = 'Saturday' then ((@sett_date+23)-1)
                                 when DATENAME (dw, @sett_date+23) = 'Sunday' then ((@sett_date+23)-2)
                                 else @sett_date+23 end) B24
ON A.SECID = B24.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D25 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+24) = 'Saturday' then ((@sett_date+24)-1)
                                 when DATENAME (dw, @sett_date+24) = 'Sunday' then ((@sett_date+24)-2)
                                 else @sett_date+24 end) B25
ON A.SECID = B25.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D26 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+25) = 'Saturday' then ((@sett_date+25)-1)
                                 when DATENAME (dw, @sett_date+25) = 'Sunday' then ((@sett_date+25)-2)
                                 else @sett_date+25 end) B26
ON A.SECID = B26.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D27 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+26) = 'Saturday' then ((@sett_date+26)-1)
                                 when DATENAME (dw, @sett_date+26) = 'Sunday' then ((@sett_date+26)-2)
                                 else @sett_date+26 end) B27
ON A.SECID = B27.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D28 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+27) = 'Saturday' then ((@sett_date+27)-1)
                                 when DATENAME (dw, @sett_date+27) = 'Sunday' then ((@sett_date+27)-2)
                                 else @sett_date+27 end) B28
ON A.SECID = B28.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D29 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+28) = 'Saturday' then ((@sett_date+28)-1)
                                 when DATENAME (dw, @sett_date+28) = 'Sunday' then ((@sett_date+28)-2)
                                 else @sett_date+28 end) B29
ON A.SECID = B29.SECID

LEFT JOIN (SELECT SECID, (CLPRICE_8)D30 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+29) = 'Saturday' then ((@sett_date+29)-1)
                                 when DATENAME (dw, @sett_date+29) = 'Sunday' then ((@sett_date+29)-2)
                                 else @sett_date+29 end) B30
ON A.SECID = B30.SECID


LEFT JOIN (SELECT SECID, (CLPRICE_8)D31 FROM SECP 
           where EFFDATE = case  when DATENAME (dw, @sett_date+30) = 'Saturday' then ((@sett_date+30)-1)
                                 when DATENAME (dw, @sett_date+30) = 'Sunday' then ((@sett_date+30)-2)
                                 else @sett_date+30 end) B31
ON A.SECID = B31.SECID

Answer 1

由于参数嗅探，您的程序会因性能而受到影响。尝试使用局部变量将输入参数@sett_date重写为：

ALTER PROCEDURE [dbo].[SP_SEC_PRICES_FOR_SKP] @sett_date datetime as

declare @v_sett_date datetime;
set @v_sett_date datetime =  @sett_date;

然后在整个过程中使用局部变量@v_sett_date。此方法的优点是当您将参数分配给局部变量时，SQL Server使用统计密度而不是统计直方图，但缺点在于某些查询将使用次优计划，因为密度不足以作为统计直方图。

Answer 2

This question has been there before并且答案始终相同：不同的SET选项或参数嗅探。

我对set QUOTED_IDENTIFIER ON持怀疑态度。你为什么要运行这个陈述？确保SSMS和您的应用的QUOTED_IDENTIFIER设置始终相同。到处都应该是ON。通过使用SSMS编写脚本并对"QUOTED_IDENTIFIER OFF"进行文本搜索来审核数据库。那应该不存在。

Answer 3

您的程序可能是参数嗅探的受害者。已经回答了这个问题：query-runs-fast-but-runs-slow-in-stored-procedure

Answer 4

我只是改变了你试图实现的方式，首先生成了一个日历表，然后进行了连接和PIVOT数据，试着这样思考......这肯定会提高性能

declare @start datetime
declare @end datetime

set @start = '2013-12-01'  --first Day
SELECT DATEADD(dd,-(DAY(DATEADD(mm,1,@start))),DATEADD(mm,1,@start))
SELECT @end=DATEADD(dd,-(DAY(DATEADD(mm,1,@start))),DATEADD(mm,1,@start))    --last Day of month
;with cte as
(
select @start firstday,
             CASE 
                 WHEN Datename (dw, @start) = 'Saturday' 
               THEN ( 
                 @start - 1 ) 
                 WHEN Datename (dw, @start) = 'Sunday' 
               THEN ( 
                 @start - 2 ) 
                 ELSE @start 
             END  WorkingDay
             ,1  [Day]
union all
select firstday + 1,
            CASE 
                 WHEN Datename (dw, firstday + 1) = 'Saturday' 
                 THEN ( 
                 @start - 1 ) 
                 WHEN Datename (dw, firstday + 1) = 'Sunday' 
               THEN ( 
                 @start - 2 ) 
                 ELSE @start 
             END  WorkingDay,[Day] +1   
from cte
where firstday < @end
)

SELECT * INTO #tmpCalendar FROM CTE

SELECT * FROM
(
Select A.secid, 
       A.prodtype, 
       A.ccy,
       sp.clprice_8,'d' + C.[Day] AS [DAY],
       @start, 
       @start + 4, 
       @start + 30 
    FROM   secm A 
    LEFT JOIN secp sp ON SP.secid=A.secid
    INNER JOIN #tmpCalendar C ON effdate=WorkingDay
) Result
PIVOT
(AVG(sp.clprice_8)   FOR [DAY] IN(d1,d2..............,d31)
 )
AS P

存储过程需要更长时间才能执行SQL Server 2005中的TSQL查询

4 个答案: