SELECT Column AS #ParameterName in SQL Server stored procedure - sql

Question

I have a stored procedure and I need to pass in a column alias as a parameter, how can I make this work?
This is the line of the stored procedure giving me trouble:
ManufacturerPriceListQty.Price As #PriceLevelAlias
and here is the stored procedure:
ALTER PROCEDURE [dbo].[Export_Products]
#PriceLevelAlias AS VARCHAR(25),
#PriceListCodes AS VARCHAR(250) --Exmaple: 'Des', 'Designer', 'Non-Stocking', 'NonStocking'
AS
BEGIN
SET NOCOUNT ON;
--PRINT #PriceListCodes
--SELECT * FROM dbo.Split(#PriceListCodes,',')
-- Insert statements for procedure here
SELECT
CAST(p.ManufacturerID as varchar(2))+'-'+p.ProductNumber AS ItemID,
SUBSTRING(p.ProductName,0,100) as ItemName,
p.ProductName AS [Description],
ManufacturerPriceListQty.Price As #PriceLevelAlias,
ManufacturerPriceListQty.Qty as OnHandQuantity,
ManufacturerPriceListQty.MultipleQty as OrderMinimumQuantity,
ManufacturerPriceListQty.MultipleQty as OrderMultipleQuantity,
Manufacturer.CompanyName AS CatalogName,
Manufacturer.CompanyName AS CatalogCode,
p.ProductNumber as UDF1,
CAST(p.ManufacturerID as varchar(2)) AS UDF2,
'%'+CAST(p.ProductID as varchar(10)) as UDF5,
CASE
WHEN P.Active ='1' THEN 'FALSE'
ELSE 'TRUE'
END AS IsDeleted,
#PriceLevelAlias AS PriceLevel,
ManufacturerPriceList.PriceListCode,
ManufacturerPriceListProduct.PriceListID
FROM
ManufacturerPriceListProduct
INNER JOIN
ManufacturerPriceList ON ManufacturerPriceListProduct.PriceListID = ManufacturerPriceList.PriceListID
INNER JOIN
Manufacturer ON ManufacturerPriceList.ManufacturerID = Manufacturer.ManufacturerID
INNER JOIN
ManufacturerPriceListQty ON ManufacturerPriceListProduct.PriceListProductID = ManufacturerPriceListQty.PriceListProductID
INNER JOIN
Product p ON ManufacturerPriceListProduct.ProductID = p.ProductID
WHERE
(Manufacturer.Active = 1)
AND p.Discontinued = 0
AND PriceListCode IN (SELECT * FROM dbo.Split(#PriceListCodes, ','))
END

Answer 1

instead of the direct script, try using the final select statement as Query string. Try the below :
ALTER PROCEDURE [dbo].[Export_Products]
#PriceLevelAlias AS VARCHAR(25),
#PriceListCodes AS VARCHAR(250) --Exmaple: 'Des', 'Designer', 'Non-Stocking', 'NonStocking'
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
--PRINT #PriceListCodes
--SELECT * FROM dbo.Split(#PriceListCodes,',')
-- Insert statements for procedure here
DECLARE #v_Qry VARCHAR(MAX)
SELECT
#v_Qry = '
SELECT
CAST(p.ManufacturerID as varchar(2))+''-''+p.ProductNumber AS ItemID
,SUBSTRING(p.ProductName,0,100) as ItemName
,p.ProductName AS [Description]
,ManufacturerPriceListQty.Price As '+#PriceLevelAlias+'
,ManufacturerPriceListQty.Qty as OnHandQuantity
,ManufacturerPriceListQty.MultipleQty as OrderMinimumQuantity
,ManufacturerPriceListQty.MultipleQty as OrderMultipleQuantity
,Manufacturer.CompanyName AS CatalogName
,Manufacturer.CompanyName AS CatalogCode
,p.ProductNumber as UDF1
,CAST(p.ManufacturerID as varchar(2)) AS UDF2
,''%''+CAST(p.ProductID as varchar(10)) as UDF5
,CASE
WHEN P.Active =''1'' THEN ''FALSE''
ELSE ''TRUE''
END AS IsDeleted
,#PriceLevelAlias AS PriceLevel
,ManufacturerPriceList.PriceListCode
,ManufacturerPriceListProduct.PriceListID
FROM ManufacturerPriceListProduct INNER JOIN
ManufacturerPriceList ON ManufacturerPriceListProduct.PriceListID = ManufacturerPriceList.PriceListID INNER JOIN
Manufacturer ON ManufacturerPriceList.ManufacturerID = Manufacturer.ManufacturerID INNER JOIN
ManufacturerPriceListQty ON ManufacturerPriceListProduct.PriceListProductID = ManufacturerPriceListQty.PriceListProductID INNER JOIN
Product p ON ManufacturerPriceListProduct.ProductID = p.ProductID
WHERE (Manufacturer.Active = 1)
AND p.Discontinued=0
AND PriceListCode
IN(SELECT * FROM dbo.Split(#PriceListCodes,'',''))'
EXEC(#v_Qry)
END

Answer 2

It is not possible to set a column's alias dynamically. The only way to achieve this, is to create the full statement dynamically (there is an answer already).
With a closed set of possible values you could use a structure with IF to define your statement in all possible combinations.
The following might help you, if you have a closed set of values and the calling code knows, which column name is to be used.
As your SP is returning a result set, you might include the same value with all possible names. Look at this example
SELECT *
,type_desc AS Name1
,type_desc AS Name2
,type_desc AS Name3
--add all possible types here
FROM sys.objects
Which column you use after the call, will then be the decision of the calling code...

Answer 3

There were two other variables that need to be taken outside of the string:
`ALTER PROCEDURE [dbo].[Export_Products]
#PriceLevelAlias AS VARCHAR(25),
#PriceListCodes AS VARCHAR(250) --Exmaple: 'Des', 'Designer', 'Non-Stocking', 'NonStocking'
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
--PRINT #PriceListCodes
--SELECT * FROM dbo.Split(#PriceListCodes,',')
-- Insert statements for procedure here
DECLARE #v_Qry VARCHAR(MAX)
SELECT
#v_Qry = '
SELECT
CAST(p.ManufacturerID as varchar(2))+''-''+p.ProductNumber AS ItemID
,SUBSTRING(p.ProductName,0,100) as ItemName
,p.ProductName AS [Description]
,ManufacturerPriceListQty.Price As '+#PriceLevelAlias+'
,ManufacturerPriceListQty.Qty as OnHandQuantity
,ManufacturerPriceListQty.MultipleQty as OrderMinimumQuantity
,ManufacturerPriceListQty.MultipleQty as OrderMultipleQuantity
,Manufacturer.CompanyName AS CatalogName
,Manufacturer.CompanyName AS CatalogCode
,p.ProductNumber as UDF1
,CAST(p.ManufacturerID as varchar(2)) AS UDF2
,''%''+CAST(p.ProductID as varchar(10)) as UDF5
,CASE
WHEN P.Active =''1'' THEN ''FALSE''
ELSE ''TRUE''
END AS IsDeleted
,''' + #PriceLevelAlias + ''' AS PriceLevel
,ManufacturerPriceList.PriceListCode
,ManufacturerPriceListProduct.PriceListID
FROM ManufacturerPriceListProduct INNER JOIN
ManufacturerPriceList ON ManufacturerPriceListProduct.PriceListID = ManufacturerPriceList.PriceListID INNER JOIN
Manufacturer ON ManufacturerPriceList.ManufacturerID = Manufacturer.ManufacturerID INNER JOIN
ManufacturerPriceListQty ON ManufacturerPriceListProduct.PriceListProductID = ManufacturerPriceListQty.PriceListProductID INNER JOIN
Product p ON ManufacturerPriceListProduct.ProductID = p.ProductID
WHERE (Manufacturer.Active = 1)
AND p.Discontinued=0
AND PriceListCode
IN(SELECT * FROM dbo.Split(''' + #PriceListCodes + ''','',''))'
EXEC(#v_Qry)
END`