SQL query with SUM, ORDER BY, with limited values - tsql

Question

I am having a troubles to get expected result.
I have successfully joined 2 tables (database is SQL Server), however I would like to have something more.
Excel - it's table which contains list of PartNumbers(GBC) with corresponding Quantity of this part needed for build.
I'm joining this Excel with my Inventory database to retrieve information about what I have, what is missing, what I need to purchase.
Current query:
string sqlCheck = #"SELECT e.GBC, e.Replaced, e.Description, Barcode, Location, Bookstand, Quantity, Buildneed, p.Quantity - e.Buildneed as Afterbuild FROM Parts p Right JOIN Excel e ON e.GBC = p.GBC ORDER BY GBC ASC, Quantity DESC";
Results as below image:
It is needed to use ALL duplicated GBC but in specific order.
First I need to take GBC(86911) with Quantity = 100, this should result in Afterbuild = 0.
But in column Buildneed I see that I need 768 in total, so next step would be to take GBC(86911) with quantity = 500, this should result in Afterbuild 0, and in this line I would like to see new column called Totals which will be equal to -168 (which will mean I need to buy 168 pcs of this part).
I can have many same parts with different quantities
I always want to start from lowest quantity on particular duplicated GBC
This should not show me more GBC if Buildneed value will be exceeded
Expected output as on below image:
I have added column 'UseInOrder' - it is not neccessery but would be awesome if its possible also, it will point me that I will need to use all parts from each in that order.
As suggested, below table definitions:
CREATE TABLE [dbo].[Excel] (
[GBC] INT NULL,
[Description] VARCHAR (50) NULL,
[Buildneed] INT NULL,
[Replaced] VARCHAR (50) NULL
);
CREATE TABLE [dbo].[Parts] (
[Barcode] INT IDENTITY (201900001, 1) NOT NULL,
[GBC] INT NULL,
[Description] VARCHAR (50) NULL,
[Location] VARCHAR (50) NULL,
[Bookstand] VARCHAR (50) NULL,
[Value] VARCHAR (50) NULL,
[Quantity] INT NULL,
[MQuantity] INT NULL,
[Manufacturer1] VARCHAR (50) NULL,
[MPN1] VARCHAR (50) NULL,
[Manufacturer2] VARCHAR (50) NULL,
[MPN2] VARCHAR (50) NULL,
[Manufacturer3] VARCHAR (50) NULL,
[MPN3] VARCHAR (50) NULL,
CONSTRAINT [PK_Parts] PRIMARY KEY CLUSTERED ([Barcode] ASC)
);
EDIT Sample data
declare #tblParts table(
GBC int,
Barcode varchar(256),
[Location] varchar(256),
Quantity int
)
declare #tblPartsUsed table(
GBC int,
Replaced varchar(1) default '',
[Description] varchar(50),
Buildneed int
)
insert into #tblParts (GBC,[Description], Barcode, [Location], Quantity)
select 86911, 'CAP_CER,10nF,0603,10%,100V,X7R' ,201901200, 'JD-01/  14' ,500
union all
select 86911, 'CAP_CER,10nF,0603,10%,100V,X7R' ,201901166, 'ESB-03' ,100
union all
select 99529, 'DIO_ZENR,5,6V,2%,MM3Z5V6ST1G,SOD323' ,201901024, 'ESB-01' ,100
union all
select 128082, 'CAP_CER,100nF,0603,10%,50V,X7R, poly' ,201901120, 'JD-01/  3' ,500
union all
select 128082, 'CAP_CER,100nF,0603,10%,50V,X7R, poly' ,201901121, 'JD-01/  3' ,500
union all
select 168078, 'CAP_CER,470nF,0805,10%,50V,X7R' ,201901207, 'JD-01/  19' ,170
union all
select 168078, 'CAP_CER,470nF,0805,10%,50V,X7R' ,201901152, 'ESB-03' ,140
union all
select 196881, 'BJT,C,SMBT3946DW1T1G,SOT363' ,201901085, 'ESB-02' ,100
union all
select 199296, 'BJT_DIG,C,SMUN5311DW1T1G,SOT363' ,201901083, 'ESB-02' ,100
union all
select 207735, 'DIO_LED, NFSA123DT' ,201902132, 'KRK' ,10
insert into #tblPartsUsed(GBC, [Description], Buildneed)
select 71744, 'RES_TF,10k,0402,1%,0,1W,100PPM/C' ,192
union all
select 71746, 'RES_TF,10k,0603,1%,0,1W,100PPM/C' ,168
union all
select 76527, 'CAP_CER,10nF,0402,10%,50V,X7R' ,288
union all
select 86911, 'CAP_CER,10nF,0603,10%,100V,X7R' ,1464
union all
select 92854, 'RES_TF,30k,0603,1%,0,1W,100PPM/C' ,72
union all
select 93018, 'RES_TF,68k,0603,1%,0,1W,100PPM/C' ,72
union all
select 95241, 'RES_TF,2k2,0402,1%,0,1W,100PPM/C' ,192
union all
select 95549, 'RES_TF,47k,0603,1%,0,1W,100PPM/C' ,72
union all
select 99529, 'DIO_ZENR,5,6V,2%,MM3Z5V6ST1G,SOD323' ,72
union all
select 112117, 'RES_TF,2k2,0603,1%,0,1W,100PPM/C' ,96
union all
select 126486, 'RES_TF,0R,0603' ,24
union all
select 128082, 'CAP_CER,100nF,0603,10%,50V,X7R, poly' ,72
union all
select 168078, 'CAP_CER,470nF,0805,10%,50V,X7R' ,72
union all
select 196200, 'BJT_DIG,N,PDTC114EU,SOT323' ,72
union all
select 196881, 'BJT,C,SMBT3946DW1T1G,SOT363' ,144
union all
select 199296, 'BJT_DIG,C,SMUN5311DW1T1G,SOT363' ,504
union all
select 199302, 'RES_TF,100R,0603,10%,0,1W,200PPM/C' ,72
union all
select 202047, 'UNI,N,PMPB215ENEA,DFN2020MD-6' ,72
union all
select 202054, 'DIO_LED,SPMWHT346EA3' ,648
union all
select 203509, 'CONN_HEADER,MOLEX,5023521100' ,24
union all
select 207735, 'DIO_LED, NFSA123DT' ,648
union all
select 207843, 'Thermistor,10k,0603,1%,NTC' ,24
union all
select 208252, 'FOOTPRINT_BOARD-IN,MOLEX,350220011' ,48
union all
select 212145, 'DIO_SIGN,200V,250mA,50nS,BAV21WSQ-7-F,SOD323' ,72
Based on this date, output should be like on below image of table:

Answer 1

Try this
EDIT2 (after change initial data)
SELECT distinct u.GBC,p2.Replaced, p2.Description, IIF(u.Afterbuild>0, MIN(p1.Barcode) OVER(PARTITION BY u.GBC), p1.Barcode) as Barcode, p1.Location, u.Quantity, u.Buildneed,
CASE
when (u.Total <0 AND p1.Barcode is NULL) OR (SUM(u.Quantity) OVER(PARTITION BY u.GBC) - u.Buildneed)>0 then u.Afterbuild
else 0
end
as Afterbuild,
CASE
when u.Total <0 AND p1.Barcode is NULL then ABS(u.Total)
when (SUM(u.Quantity) OVER(PARTITION BY u.GBC) - u.Buildneed)>0 then u.Total
else u.Total
END as Total FROM
(
SELECT distinct b.GBC, b.Quantity, b.Buildneed,
case
when b.Total <0 then null
when b.Total >=0 AND MIN(b.Quantity) OVER(PARTITION BY b.GBC) - b.Buildneed < 0 AND b.Quantity = MAX(b.Quantity) OVER(PARTITION BY b.GBC) then SUM(b.Quantity) OVER(PARTITION BY b.GBC) - b.Buildneed
when b.Total >=0 AND MIN(b.Quantity) OVER(PARTITION BY b.GBC) - b.Buildneed >= 0 AND b.Quantity = MIN(b.Quantity) OVER(PARTITION BY b.GBC) then MIN(b.Quantity) OVER(PARTITION BY b.GBC) - b.Buildneed
END AS Afterbuild,
case
when b.Total >=0 then null
when b.Total <0 AND b.RowNumber = MAX(b.RowNumber) OVER(PARTITION BY b.GBC) then b.Total
END AS Total
FROM
(
select r.GBC, r.Quantity, r.Buildneed,
(SUM(r.Quantity) OVER(PARTITION BY r.GBC)) - r.Buildneed as Total, ROW_NUMBER() OVER(order by r.GBC, r.Quantity) as RowNumber
from
(
SELECT e.GBC, ISNULL(Quantity,0) as Quantity, ISNULL(Buildneed,0) as Buildneed FROM #tblParts p RIGHT JOIN #tblPartsUsed e ON e.GBC = p.GBC
) as r
) as b
) as u
left join #tblParts as p1 on u.GBC = p1.GBC and ISNULL(u.Quantity,0) = ISNULL(p1.Quantity,0)
left join #tblPartsUsed as p2 on u.GBC = p2.GBC and ISNULL(u.Buildneed,0) = ISNULL(p2.Buildneed,0)
where (u.Afterbuild is not null or u.Total is not null or u.Quantity - u.Buildneed < 0)
order by u.GBC, u.Quantity

Answer 2

As per #RomaRuzich this question needs expected results in a table format.
Also the Parts and Excel table structure is needed with some data to clarify the question.
Made some assumptions and created script with output results.
declare #tblParts table(
GBC int,
Barcode varchar(20),
[Location] varchar(20),
Bookstand varchar(10) default '',
Quantity int
)
declare #tblPartsUsed table(
GBC int,
Replaced varchar(1) default '',
[Description] varchar(50),
Buildneed int
)
insert into #tblParts(GBC, Barcode, [Location], Quantity)
select 72223, '', '', 0
union all
select 86911, '201901200','JD-01/',500
union all
select 86911, '201901166','JD-01/ 14', 100
insert into #tblPartsUsed(GBC, [Description], Buildneed)
select '72223', 'RES_TF', 60
union all
select '86911', 'CAP_CER, 10nf,0603', 768
union all
select '86911', 'CAP_CER, 10nf,0603', 768
SELECT distinct e.GBC, e.Replaced, e.[Description], Barcode, [Location],
Bookstand, Quantity, Buildneed,
p.Quantity - e.Buildneed as Afterbuild,
x.TotalQuantity - Buildneed as Totals
FROM #tblParts p Right JOIN #tblPartsUsed e ON e.GBC = p.GBC
left join (select GBC, sum(Quantity) TotalQuantity from #tblParts group by GBC) x <br/>on e.GBC = x.GBC
ORDER BY e.GBC ASC, p.Quantity ASC