我有一张如下表：
frm - To cost type
A - B 10 1
B - C 20 2
B - K 05 2
C - D 08 2
D - E 10 2
E - F 12 3
K - D 13 2
K - M 18 2
M - D 08 2
输出应该是：
col1 col2
A - B - C - D - E - F - 60 -- (based on (A+B)+(B+C)+(C+D)+(D+E)+(E+F) i.e. (10+20+08+10+12) )
A - B - K - M - D - E - F - 63 -- based on (10+05+14+08+10+12)
现在，
我想从类型 1 开始，即A - B进一步组合类型 2，然后 以类型 3行结束，即上例中的E - F。
使用多个 while 循环并在其中使用可以实现的临时表，但这会对性能造成更大的影响。
这是我到目前为止所做的：
注意：可能存在一些错误，因为我已经找到并替换以替换实际的表和列，但是从这里你会明白我使用了什么
IF OBJECT_ID('tempdb..#tmpFinalTbl') IS NOT NULL
DROP TABLE #tmpFinalTbl
create table #tmpFinalTbl
(
Sector_Name varchar(max),
finalRate decimal(18,5)
)
IF OBJECT_ID('tempdb..#tmpType1Sectors') IS NOT NULL
DROP TABLE #tmpType1Sectors
select * into #tmpType1Sectors from TableName
where Type_Id = 1
select * from #tmpType1Sectors
declare @tempType1SectorsCount int
set @tempType1SectorsCount = (select count(*) from #tmpType1Sectors)
while @tempType1SectorsCount > 0
begin -- begin of #tmpType1Sectors while loop
declare @fromID int
declare @toID int
declare @tempCost decimal(18,5)
declare @tempCost1 decimal(18,5)
declare @tempCost2 decimal(18,5)
declare @finalSectorName varchar(max)
declare @tempSectorID int
declare @finalCost decimal(18,5)
set @fromID = (select top 1 From_Id from #tmpType1Sectors)
set @toID = (select top 1 To_Id from #tmpType1Sectors)
set @tempSectorID = (select top 1 Id from #tmpType1Sectors)
set @finalSectorName = -- getting from another table as initial type 1 i.e. A - B
set @tempCost = (select top 1 Cost from #tmpType1Sectors)
set @tempCost1 = (select top 1 Cost1 from #tmpType1Sectors)
set @tempCost2 = (select top 1 Cost2 from #tmpType1Sectors)
print 'From Loc'
print @fromID
print 'To Loc'
print @toID
print 'Sector'
print @finalSectorName
print 'Cost'
print @tempCost
print 'Cost 1'
print @tempCost1
print 'Cost 2'
print @tempCost2
IF OBJECT_ID('tempdb..#tmpType2Sectors') IS NOT NULL
DROP TABLE #tmpType2Sectors
select * into #tmpType2Sectors from TableName
where From_Id = @toID
and
Sector_Type_Id = 2
declare @tempTYpe2SectorsCount int
set @tempTYpe2SectorsCount = (select count(*) from #tmpType2Sectors)
if(@tempTYpe2SectorsCount > 1)
begin
while @tempTYpe2SectorsCount > 0
begin -- begin of #tmpType2Sectors while loop
declare @tempTrSector varchar(max)
set @fromID = (select top 1 From_Id from #tmpType2Sectors)
set @toID = (select top 1 To_Id from #tmpType2Sectors)
set @tempTrSector = (select top 1 substring(Sector_Code,CHARINDEX('-',Sector_Code)+1,LEN(Sector_Code)) from #tmpType2Sectors)
set @tempCost = ISNULL(@tempCost,0) + (select top 1 Cost from #tmpType2Sectors)
set @tempCost1 = ISNULL(@tempCost1,0) + (select top 1 Cost1 from #tmpType2Sectors)
set @tempCost2 = ISNULL(@tempCost2,0) + (select top 1 Cost2 from #tmpType2Sectors)
set @finalCost = ISNULL(@tempCost,0) + ISNULL(@tempCost1,0) + ISNULL(@tempCost2,0)
set @finalSectorName = @finalSectorName + '-' + @tempTrSector
print 'Tr From Loc'
print @fromID
print 'Tr To Loc'
print @toID
IF OBJECT_ID('tempdb..#tmpType3Sectors') IS NOT NULL
DROP TABLE #tmpType3Sectors
select * into #tmpType3Sectors from TableName
where From_Id = @toID
and
Sector_Type_Id = 3
--select * from #tmpType3Sectors
declare @tempType3SectorsCount int
set @tempType3SectorsCount = (select count(*) from #tmpType3Sectors)
if(@tempType3SectorsCount > 1)
begin
while @tempType3SectorsCount > 0
begin -- begin of #tmpType3Sectors while loop
declare @tempDelSector varchar(max)
set @fromID = (select top 1 From_Id from #tmpType3Sectors)
set @toID = (select top 1 To_Id from #tmpType3Sectors)
set @tempDelSector = (select top 1 substring(Sector_Code,CHARINDEX('-',Sector_Code)+1,LEN(Sector_Code)) from #tmpType3Sectors)
set @tempCost = ISNULL(@tempCost,0) + (select top 1 Cost from #tmpType3Sectors)
set @tempCost1 = ISNULL(@tempCost1,0) + (select top 1 Cost1 from #tmpType3Sectors)
set @tempCost2 = ISNULL(@tempCost2,0) + (select top 1 Cost2 from #tmpType3Sectors)
print 'Del From Loc'
print @fromID
print 'Del To Loc'
print @toID
print '@tempDelSector'
print @tempDelSector
set @finalCost = ISNULL(@tempCost,0) + ISNULL(@tempCost1,0) + ISNULL(@tempCost2,0)
set @finalSectorName = @finalSectorName + '-' + @tempDelSector
print 'final Sector'
print @finalSectorName
insert into #tmpFinalTbl
(
Sector_Name,
finalRate
)
values
(
@finalSectorName,
@finalCost
)
delete top(1) from #tmpType3Sectors
set @tempType3SectorsCount = @tempType3SectorsCount - 1
end -- end of #tmpType3Sectors while loop
end
else
begin
print 'One Del'
-- handle if one sequence is found
set @tempDelSector = (select top 1 substring(Sector_Code,CHARINDEX('-',Sector_Code)+1,LEN(Sector_Code)) from #tmpType3Sectors)
set @tempCost = ISNULL(@tempCost,0) + (select top 1 Cost from #tmpType3Sectors)
set @tempCost1 = ISNULL(@tempCost1,0) + (select top 1 Cost1 from #tmpType3Sectors)
set @tempCost2 = ISNULL(@tempCost2,0) + (select top 1 Cost2 from #tmpType3Sectors)
set @fromID = (select top 1 From_Id from #tmpType3Sectors)
set @toID = (select top 1 To_Id from #tmpType3Sectors)
print 'Del From Loc'
print @fromID
print 'Del To Loc'
print @toID
print '@tempDelSector'
print @tempDelSector
set @finalCost = ISNULL(@tempCost,0) + ISNULL(@tempCost1,0) + ISNULL(@tempCost2,0)
set @finalSectorName = @finalSectorName + '-' + @tempDelSector
print 'final Sector'
print @finalSectorName
insert into #tmpFinalTbl
(
Sector_Name,
finalRate
)
values
(
@finalSectorName,
@finalCost
)
end -- end of Del Handling
print '@tempTrSector'
print @tempTrSector
set @finalCost = ISNULL(@tempCost,0) + ISNULL(@tempCost1,0) + ISNULL(@tempCost2,0)
set @finalSectorName = @finalSectorName + '-' + @tempTrSector
insert into #tmpFinalTbl
(
Sector_Name,
finalRate
)
values
(
@finalSectorName,
@finalCost
)
delete top(1) from #tmpType2Sectors
set @tempTYpe2SectorsCount = @tempTYpe2SectorsCount - 1
end -- end of #tmpType2Sectors while loop
end
else
begin
print 'One Tr'
-- handle if one sequence is found
set @fromID = (select top 1 From_Id from #tmpType2Sectors)
set @toID = (select top 1 To_Id from #tmpType2Sectors)
set @tempTrSector = (select top 1 substring(Sector_Code,CHARINDEX('-',Sector_Code)+1,LEN(Sector_Code)) from #tmpType2Sectors)
set @tempCost = ISNULL(@tempCost,0) + (select top 1 Cost from #tmpType2Sectors)
set @tempCost1 = ISNULL(@tempCost1,0) + (select top 1 Cost1 from #tmpType2Sectors)
set @tempCost2 = ISNULL(@tempCost2,0) + (select top 1 Cost2 from #tmpType2Sectors)
set @finalCost = ISNULL(@tempCost,0) + ISNULL(@tempCost1,0) + ISNULL(@tempCost2,0)
set @finalSectorName = @finalSectorName + '-' + @tempTrSector
print 'Tr From Loc'
print @fromID
print 'Tr To Loc'
print @toID
print '@tempTrSector'
print @tempTrSector
IF OBJECT_ID('tempdb..#tmpType3Sectors1') IS NOT NULL
DROP TABLE #tmpType3Sectors1
select * into #tmpType3Sectors1 from TableName
where From_Id = @toID
and
Sector_Type_Id = 3
--select * from #tmpType3Sectors1
--declare @tempType3SectorsCount int
set @tempType3SectorsCount = (select count(*) from #tmpType3Sectors1)
if(@tempType3SectorsCount > 1)
begin
while @tempType3SectorsCount > 0
begin -- begin of #tmpType3Sectors1 while loop
--declare @tempDelSector varchar(max)
set @fromID = (select top 1 From_Id from #tmpType3Sectors1)
set @toID = (select top 1 To_Id from #tmpType3Sectors1)
set @tempDelSector = (select top 1 substring(Sector_Code,CHARINDEX('-',Sector_Code)+1,LEN(Sector_Code)) from #tmpType3Sectors1)
set @tempCost = ISNULL(@tempCost,0) + (select top 1 Cost from #tmpType3Sectors1)
set @tempCost1 = ISNULL(@tempCost1,0) + (select top 1 Cost1 from #tmpType3Sectors1)
set @tempCost2 = ISNULL(@tempCost2,0) + (select top 1 Cost2 from #tmpType3Sectors1)
print '@tempDelSector'
print @tempDelSector
set @finalCost = ISNULL(@tempCost,0) + ISNULL(@tempCost1,0) + ISNULL(@tempCost2,0)
set @finalSectorName = @finalSectorName + '-' + @tempDelSector
print 'final Sector'
print @finalSectorName
insert into #tmpFinalTbl
(
Sector_Name,
finalRate
)
values
(
@finalSectorName,
@finalCost
)
delete top(1) from #tmpType3Sectors1
set @tempType3SectorsCount = @tempType3SectorsCount - 1
end -- end of #tmpType3Sectors1 while loop
end
else
begin
print 'One Del'
-- handle if one sequence is found
set @fromID = (select top 1 From_Id from #tmpType3Sectors1)
set @toID = (select top 1 To_Id from #tmpType3Sectors1)
set @tempDelSector = (select top 1 substring(Sector_Code,CHARINDEX('-',Sector_Code)+1,LEN(Sector_Code)) from #tmpType3Sectors1)
set @tempCost = ISNULL(@tempCost,0) + (select top 1 Cost from #tmpType3Sectors1)
set @tempCost1 = ISNULL(@tempCost1,0) + (select top 1 Cost1 from #tmpType3Sectors1)
set @tempCost2 = ISNULL(@tempCost2,0) + (select top 1 Cost2 from #tmpType3Sectors1)
print '@tempDelSector'
print @tempDelSector
set @finalCost = ISNULL(@tempCost,0) + ISNULL(@tempCost1,0) + ISNULL(@tempCost2,0)
set @finalSectorName = @finalSectorName + '-' + @tempDelSector
print 'final Sector'
print @finalSectorName
insert into #tmpFinalTbl
(
Sector_Name,
finalRate
)
values
(
@finalSectorName,
@finalCost
)
end -- end of Del Handling
--set @finalCost = ISNULL(@tempCost,0) + ISNULL(@tempCost1,0) + ISNULL(@tempCost2,0)
--set @finalSectorName = @finalSectorName + '-' + @tempTrSector
insert into #tmpFinalTbl
(
Sector_Name,
finalRate
)
values
(
@finalSectorName,
@finalCost
)
end
delete top(1) from #tmpType1Sectors
set @tempType1SectorsCount = @tempType1SectorsCount - 1
end -- end of while loop
select * from #tmpFinalTbl
编辑：尝试 CTE（递归查询）来获取输出，但如果类型 2 组合不止一个，即 B 到 C 和 B 到 K，那么它将以无限递归结束。:(
任何帮助将不胜感激。
提前致谢。