从存储过程返回游标中创建的行
Returning Rows Created in a Cursor From a Stored Procedure
我有一个 table 三列，每列包含逗号分隔的数据，例如
AAA,BBB,CCC,DDD,...。
我想 return CROSS JOIN 包含所有列中所有标记的所有可能组合，以及每行中的其他一些列。
我有一个 Split 函数，它 return 是 table 中的标记。我传入每一列并返回一堆行。
我想出的最好的方法是使用游标，每次一行一行。完成 CROSS JOIN 后，我将所有计算的行写入 work/temp table。处理完所有行后，我 SELECT 从 work/temp table 到 return 计算的行。
我的问题：没有 work/temp table 有没有办法做到这一点？
我现在的密码是：
DECLARE cPKG CURSOR FAST_FORWARD FOR SELECT ID, SEARCH, COUNTY, COMPANY FROM DEV..EXPPKG WITH(NOLOCK)
OPEN cPKG
FETCH NEXT FROM cPKG INTO @ID, @SEARCH, @COUNTY, @COMPANY
WHILE @@FETCH_STATUS = 0
BEGIN
INSERT INTO DEV..PKG_DUMP_WORK
(ID,
PKG_CODE,
PRICE,
CNTY,
CPNY,
SRCH,
SEARCH,
COUNTY,
COMPANY,
SRCH_COUNT,
UPDT_DT,
UPDT_BY,
UPDT_CMT)
SELECT PKG.ID,
PKG.PKG_CODE,
PKG.PRICE,
CNTY.VALUE AS CNTY,
CPNY.VALUE AS CPNY,
SRCH.VALUE AS SRCH,
PKG.SEARCH,
PKG.COUNTY,
PKG.COMPANY,
PKG.SRCH_COUNT,
PKG.UPDT_DT,
PKG.UPDT_BY,
PKG.UPDT_CMT
FROM (SELECT *
FROM DEV..EXPPKG WITH(NOLOCK)
WHERE ID = @ID) PKG
CROSS JOIN DBO.Split(@SEARCH, ',') SRCH -- AAA,BBB,CCC...
CROSS JOIN DBO.Split(@COUNTY, ',') CNTY -- DDD,EEE,FFF..
CROSS JOIN DBO.Split(@COMPANY, ',') CPNY -- GGG,HHH,KKK...
FETCH NEXT FROM cPKG INTO @ID, @SEARCH, @COUNTY, @COMPANY
END
CLOSE cPKG
DEALLOCATE cPKG
一些数据：
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'A-2', 999, 'CO,ER,FC,HB,ST,TX', 'BX,KG,QN,RI', ',AAN,ALR,CITI,GRANITE,HARB,LLS,LTTA,MADI,NARROW,REGENCY,', 6, NULL, NULL, NULL );
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'AM-2', 999, 'CO,ER,FC,HB,ST,TX', 'MA', ',ALR,CITI,GRANITE,INTER,LTTA,MADI,SKYLINE,', 6, NULL, NULL, NULL );
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'B-2', 999, 'AR,CO,ER,FC,HB,HI,HL,ST,TX', 'BX,KG,QN,RI', ',C&C,LTTA,', 9, NULL, NULL, NULL );
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'CA-2', 999, 'CO,ER,FC,HB,HI,ST,TX', 'BX,KG,MA,QN,RI', ',CANY,CHATHAM,TRAK,', 7, NULL, NULL, NULL );
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'CT-4', 999, 'CO,ER,FC,HB', 'BX,KG,MA,QN,RI', ',CLTLTNY,CTALB,CTIM,CTIM-711,CTIM-CC,CTIM-Q,CTIM-R,CTIMR-O,FNT,FNT-A,FNT-AG,FNT-N,FNT-R,NYLS,TICOR,TICORROC,FNT-RAM,', 4, NULL, NULL, NULL );
尝试使用CROSS APPLY
SELECT *
FROM DEV..EXPPKG WITH(NOLOCK)
CROSS APPLY DBO.Split(SEARCH, ',') SRCH -- AAA,BBB,CCC...
CROSS APPLY DBO.Split(COUNTY, ',') CNTY -- DDD,EEE,FFF..
CROSS APPLY DBO.Split(COMPANY, ',') CPNY
这是使用通用拆分函数的解决方案
DROP FUNCTION SplitString
GO
CREATE FUNCTION SplitString
(
@Input NVARCHAR(MAX),
@Character CHAR(1)
)
RETURNS @Output TABLE (
Value NVARCHAR(1000)
)
AS
BEGIN
DECLARE @StartIndex INT, @EndIndex INT
SET @StartIndex = 1
IF SUBSTRING(@Input, LEN(@Input) - 1, LEN(@Input)) <> @Character
BEGIN
SET @Input = @Input + @Character
END
WHILE CHARINDEX(@Character, @Input) > 0
BEGIN
SET @EndIndex = CHARINDEX(@Character, @Input)
INSERT INTO @Output(Value)
SELECT SUBSTRING(@Input, @StartIndex, @EndIndex - 1)
SET @Input = SUBSTRING(@Input, @EndIndex + 1, LEN(@Input))
END
RETURN
END
GO
declare @EXPPKG table ( ID int identity, PKG_CODE varchar(5) , PRICE int , SEARCH varchar(255), COUNTY varchar(255), COMPANY varchar(255), SRCH_COUNT varchar(255), UPDT_DT varchar(255), UPDT_BY varchar(255), UPDT_CMT varchar(255))
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'A-2', 999, 'CO,ER,FC,HB,ST,TX', 'BX,KG,QN,RI', ',AAN,ALR,CITI,GRANITE,HARB,LLS,LTTA,MADI,NARROW,REGENCY,', 6, NULL, NULL, NULL );
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'AM-2', 999, 'CO,ER,FC,HB,ST,TX', 'MA', ',ALR,CITI,GRANITE,INTER,LTTA,MADI,SKYLINE,', 6, NULL, NULL, NULL );
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'B-2', 999, 'AR,CO,ER,FC,HB,HI,HL,ST,TX', 'BX,KG,QN,RI', ',C&C,LTTA,', 9, NULL, NULL, NULL );
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'CA-2', 999, 'CO,ER,FC,HB,HI,ST,TX', 'BX,KG,MA,QN,RI', ',CANY,CHATHAM,TRAK,', 7, NULL, NULL, NULL );
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'CT-4', 999, 'CO,ER,FC,HB', 'BX,KG,MA,QN,RI', ',CLTLTNY,CTALB,CTIM,CTIM-711,CTIM-CC,CTIM-Q,CTIM-R,CTIMR-O,FNT,FNT-A,FNT-AG,FNT-N,FNT-R,NYLS,TICOR,TICORROC,FNT-RAM,', 4, NULL, NULL, NULL );
Select
select
PKG.ID,
PKG.PKG_CODE,
PKG.PRICE,
SRCH.Value AS CNTY,
CPNY.Value CPNY,
SRCH.Value AS SRCH,
PKG.SEARCH,
PKG.COUNTY,
PKG.COMPANY,
PKG.SRCH_COUNT,
PKG.UPDT_DT,
PKG.UPDT_BY,
PKG.UPDT_CMT
from @EXPPKG PKG
CROSS APPLY DBO.SplitString(SEARCH, ',') SRCH
CROSS APPLY DBO.SplitString(COUNTY, ',') CNTY
CROSS APPLY DBO.SplitString(COMPANY, ',') CPNY
结果
您可以用基于集合的插入替换整个游标。我还要提醒您不要使用该 NOLOCK 提示。它可以而且将会 return 丢失 and/or 重复行。连同其他一些令人讨厌的事情。 http://blogs.sqlsentry.com/aaronbertrand/bad-habits-nolock-everywhere/
INSERT INTO DEV..PKG_DUMP_WORK
(
ID,
PKG_CODE,
PRICE,
CNTY,
CPNY,
SRCH,
SEARCH,
COUNTY,
COMPANY,
SRCH_COUNT,
UPDT_DT,
UPDT_BY,
UPDT_CMT
)
SELECT PKG.ID,
PKG.PKG_CODE,
PKG.PRICE,
CNTY.VALUE AS CNTY,
CPNY.VALUE AS CPNY,
SRCH.VALUE AS SRCH,
PKG.SEARCH,
PKG.COUNTY,
PKG.COMPANY,
PKG.SRCH_COUNT,
PKG.UPDT_DT,
PKG.UPDT_BY,
PKG.UPDT_CMT
FROM DEV..EXPPKG PKG WITH(NOLOCK)
CROSS APPLY DBO.Split(PKG.SEARCH, ',') SRCH -- AAA,BBB,CCC...
CROSS APPLY DBO.Split(PKG.COUNTY, ',') CNTY -- DDD,EEE,FFF..
CROSS APPLY DBO.Split(PKG.COMPANY, ',') CPNY -- GGG,HHH,KKK...
我有一个 table 三列，每列包含逗号分隔的数据，例如
AAA,BBB,CCC,DDD,...。
我想 return CROSS JOIN 包含所有列中所有标记的所有可能组合，以及每行中的其他一些列。
我有一个 Split 函数，它 return 是 table 中的标记。我传入每一列并返回一堆行。
我想出的最好的方法是使用游标，每次一行一行。完成 CROSS JOIN 后，我将所有计算的行写入 work/temp table。处理完所有行后，我 SELECT 从 work/temp table 到 return 计算的行。
我的问题：没有 work/temp table 有没有办法做到这一点？
我现在的密码是：
DECLARE cPKG CURSOR FAST_FORWARD FOR SELECT ID, SEARCH, COUNTY, COMPANY FROM DEV..EXPPKG WITH(NOLOCK)
OPEN cPKG
FETCH NEXT FROM cPKG INTO @ID, @SEARCH, @COUNTY, @COMPANY
WHILE @@FETCH_STATUS = 0
BEGIN
INSERT INTO DEV..PKG_DUMP_WORK
(ID,
PKG_CODE,
PRICE,
CNTY,
CPNY,
SRCH,
SEARCH,
COUNTY,
COMPANY,
SRCH_COUNT,
UPDT_DT,
UPDT_BY,
UPDT_CMT)
SELECT PKG.ID,
PKG.PKG_CODE,
PKG.PRICE,
CNTY.VALUE AS CNTY,
CPNY.VALUE AS CPNY,
SRCH.VALUE AS SRCH,
PKG.SEARCH,
PKG.COUNTY,
PKG.COMPANY,
PKG.SRCH_COUNT,
PKG.UPDT_DT,
PKG.UPDT_BY,
PKG.UPDT_CMT
FROM (SELECT *
FROM DEV..EXPPKG WITH(NOLOCK)
WHERE ID = @ID) PKG
CROSS JOIN DBO.Split(@SEARCH, ',') SRCH -- AAA,BBB,CCC...
CROSS JOIN DBO.Split(@COUNTY, ',') CNTY -- DDD,EEE,FFF..
CROSS JOIN DBO.Split(@COMPANY, ',') CPNY -- GGG,HHH,KKK...
FETCH NEXT FROM cPKG INTO @ID, @SEARCH, @COUNTY, @COMPANY
END
CLOSE cPKG
DEALLOCATE cPKG
一些数据：
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'A-2', 999, 'CO,ER,FC,HB,ST,TX', 'BX,KG,QN,RI', ',AAN,ALR,CITI,GRANITE,HARB,LLS,LTTA,MADI,NARROW,REGENCY,', 6, NULL, NULL, NULL );
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'AM-2', 999, 'CO,ER,FC,HB,ST,TX', 'MA', ',ALR,CITI,GRANITE,INTER,LTTA,MADI,SKYLINE,', 6, NULL, NULL, NULL );
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'B-2', 999, 'AR,CO,ER,FC,HB,HI,HL,ST,TX', 'BX,KG,QN,RI', ',C&C,LTTA,', 9, NULL, NULL, NULL );
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'CA-2', 999, 'CO,ER,FC,HB,HI,ST,TX', 'BX,KG,MA,QN,RI', ',CANY,CHATHAM,TRAK,', 7, NULL, NULL, NULL );
INSERT INTO [EXPPKG] ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'CT-4', 999, 'CO,ER,FC,HB', 'BX,KG,MA,QN,RI', ',CLTLTNY,CTALB,CTIM,CTIM-711,CTIM-CC,CTIM-Q,CTIM-R,CTIMR-O,FNT,FNT-A,FNT-AG,FNT-N,FNT-R,NYLS,TICOR,TICORROC,FNT-RAM,', 4, NULL, NULL, NULL );
尝试使用CROSS APPLY
SELECT *
FROM DEV..EXPPKG WITH(NOLOCK)
CROSS APPLY DBO.Split(SEARCH, ',') SRCH -- AAA,BBB,CCC...
CROSS APPLY DBO.Split(COUNTY, ',') CNTY -- DDD,EEE,FFF..
CROSS APPLY DBO.Split(COMPANY, ',') CPNY
这是使用通用拆分函数的解决方案
DROP FUNCTION SplitString
GO
CREATE FUNCTION SplitString
(
@Input NVARCHAR(MAX),
@Character CHAR(1)
)
RETURNS @Output TABLE (
Value NVARCHAR(1000)
)
AS
BEGIN
DECLARE @StartIndex INT, @EndIndex INT
SET @StartIndex = 1
IF SUBSTRING(@Input, LEN(@Input) - 1, LEN(@Input)) <> @Character
BEGIN
SET @Input = @Input + @Character
END
WHILE CHARINDEX(@Character, @Input) > 0
BEGIN
SET @EndIndex = CHARINDEX(@Character, @Input)
INSERT INTO @Output(Value)
SELECT SUBSTRING(@Input, @StartIndex, @EndIndex - 1)
SET @Input = SUBSTRING(@Input, @EndIndex + 1, LEN(@Input))
END
RETURN
END
GO
declare @EXPPKG table ( ID int identity, PKG_CODE varchar(5) , PRICE int , SEARCH varchar(255), COUNTY varchar(255), COMPANY varchar(255), SRCH_COUNT varchar(255), UPDT_DT varchar(255), UPDT_BY varchar(255), UPDT_CMT varchar(255))
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'A-2', 999, 'CO,ER,FC,HB,ST,TX', 'BX,KG,QN,RI', ',AAN,ALR,CITI,GRANITE,HARB,LLS,LTTA,MADI,NARROW,REGENCY,', 6, NULL, NULL, NULL );
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'AM-2', 999, 'CO,ER,FC,HB,ST,TX', 'MA', ',ALR,CITI,GRANITE,INTER,LTTA,MADI,SKYLINE,', 6, NULL, NULL, NULL );
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'B-2', 999, 'AR,CO,ER,FC,HB,HI,HL,ST,TX', 'BX,KG,QN,RI', ',C&C,LTTA,', 9, NULL, NULL, NULL );
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'CA-2', 999, 'CO,ER,FC,HB,HI,ST,TX', 'BX,KG,MA,QN,RI', ',CANY,CHATHAM,TRAK,', 7, NULL, NULL, NULL );
INSERT INTO @EXPPKG ( PKG_CODE, PRICE, SEARCH, COUNTY, COMPANY, SRCH_COUNT, UPDT_DT, UPDT_BY, UPDT_CMT ) VALUES ( 'CT-4', 999, 'CO,ER,FC,HB', 'BX,KG,MA,QN,RI', ',CLTLTNY,CTALB,CTIM,CTIM-711,CTIM-CC,CTIM-Q,CTIM-R,CTIMR-O,FNT,FNT-A,FNT-AG,FNT-N,FNT-R,NYLS,TICOR,TICORROC,FNT-RAM,', 4, NULL, NULL, NULL );
Select
select
PKG.ID,
PKG.PKG_CODE,
PKG.PRICE,
SRCH.Value AS CNTY,
CPNY.Value CPNY,
SRCH.Value AS SRCH,
PKG.SEARCH,
PKG.COUNTY,
PKG.COMPANY,
PKG.SRCH_COUNT,
PKG.UPDT_DT,
PKG.UPDT_BY,
PKG.UPDT_CMT
from @EXPPKG PKG
CROSS APPLY DBO.SplitString(SEARCH, ',') SRCH
CROSS APPLY DBO.SplitString(COUNTY, ',') CNTY
CROSS APPLY DBO.SplitString(COMPANY, ',') CPNY
结果
您可以用基于集合的插入替换整个游标。我还要提醒您不要使用该 NOLOCK 提示。它可以而且将会 return 丢失 and/or 重复行。连同其他一些令人讨厌的事情。 http://blogs.sqlsentry.com/aaronbertrand/bad-habits-nolock-everywhere/
INSERT INTO DEV..PKG_DUMP_WORK
(
ID,
PKG_CODE,
PRICE,
CNTY,
CPNY,
SRCH,
SEARCH,
COUNTY,
COMPANY,
SRCH_COUNT,
UPDT_DT,
UPDT_BY,
UPDT_CMT
)
SELECT PKG.ID,
PKG.PKG_CODE,
PKG.PRICE,
CNTY.VALUE AS CNTY,
CPNY.VALUE AS CPNY,
SRCH.VALUE AS SRCH,
PKG.SEARCH,
PKG.COUNTY,
PKG.COMPANY,
PKG.SRCH_COUNT,
PKG.UPDT_DT,
PKG.UPDT_BY,
PKG.UPDT_CMT
FROM DEV..EXPPKG PKG WITH(NOLOCK)
CROSS APPLY DBO.Split(PKG.SEARCH, ',') SRCH -- AAA,BBB,CCC...
CROSS APPLY DBO.Split(PKG.COUNTY, ',') CNTY -- DDD,EEE,FFF..
CROSS APPLY DBO.Split(PKG.COMPANY, ',') CPNY -- GGG,HHH,KKK...