Question : Select statement is trimming off the leading zero

I have a stored procedure that selects a couple values and then does some calculations and then returns. When the first select (select @zone = @ServiceLevel from....) the @zone gets a value of 45. When I do this select without putting it into a parameter, I get 045. The value that @Zone is storing needs to be 045 not 45.

Any Ideas? @Zone is a nvarchar(15) so I thought that this would keep the leading zero.

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GO

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

-- =============================================
-- Author:		Brandon Leitheiser
-- Create date: 07.11.2010
-- Description:	This stored Procedure should be called when the system wants to find out the price of ups
--              hundred weight.
-- =============================================
CREATE PROCEDURE [dbo].[sp_CalcUPSHundredWeightGround]
	-- Add the parameters for the stored procedure here
	
	@Zip nvarchar(10),
	@TotalWeight int,
	@ServiceLevel nvarchar(10),
	@PlantID nvarchar(50),
	@Tier bit,
	@Zone nvarchar(15) = null,
	@UnitPrice money = null,
	@TotalPrice money output
	--@Results money OUTPUT


AS
BEGIN
    
       
    select @Zone = @ServiceLevel from upshundredweightzipzone 
    where zipstart <= @Zip and zipEnd >= @Zip and PlantID = @PlantID and Tier = @Tier 
    IF @@RowCount > 0
		Begin
		Select @UnitPrice = Price from upshundredweightzoneprice
		where Zone = @Zone and "weight" >= @TotalWeight and PlantID = @PlantID and Tier = @Tier
		Select @TotalPrice = (@TotalWeight / 100) * @UnitPrice
		Return @TotalPrice
		End
	Else
		Begin
		Select @TotalPrice = 0.00
		return @TotalPrice
		End		
END

GO

Answer : Select statement is trimming off the leading zero

Try this

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GO

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

-- =============================================
-- Author:		Brandon Leitheiser
-- Create date: 07.11.2010
-- Description:	This stored Procedure should be called when the system wants to find out the price of ups
--              hundred weight.
-- =============================================
CREATE PROCEDURE [dbo].[sp_CalcUPSHundredWeightGround]
	-- Add the parameters for the stored procedure here
	
	@Zip nvarchar(10),
	@TotalWeight int,
	@ServiceLevel nvarchar(10),
	@PlantID nvarchar(50),
	@Tier bit,
	@Zone nvarchar(15) = null,
	@UnitPrice money = null,
	@TotalPrice money output
	--@Results money OUTPUT


AS
BEGIN
    
       
    select @Zone = CAST(@ServiceLevel AS VARCHAR(MAX)) from upshundredweightzipzone 
    where zipstart <= @Zip and zipEnd >= @Zip and PlantID = @PlantID and Tier = @Tier 
    IF @@RowCount > 0
		Begin
		Select @UnitPrice = Price from upshundredweightzoneprice
		where Zone = @Zone and "weight" >= @TotalWeight and PlantID = @PlantID and Tier = @Tier
		Select @TotalPrice = (@TotalWeight / 100) * @UnitPrice
		Return @TotalPrice
		End
	Else
		Begin
		Select @TotalPrice = 0.00
		return @TotalPrice
		End		
END

GO