Using Left with Charindex in a Select Query

Question

Hi
I hope someone can help me.  I have a field that has text in it for example N00342-01/28 and I am trying to get it to only show N00342-01.  This could in the future be N132245-01/25 for example or N00342-132/28.  What I am trying to show is
anything before the "/".
The code I have created is this:
SELECT        S.ItemNumber, S.DeliveryWeek, S.Pack_Centre, S.Schedule_Qty, S.Delivered_Qty, S.PartPallet, I.Production_Reference, LEFT('I.Production_Reference',
                         CHARINDEX('/', 'I.Production_Reference') - 1) AS IntouchRef, I.Pallet_Qty, I.Tool_Number, S.Firm
FROM            dbo.Scheduled_Items AS S INNER JOIN
                         dbo.Item_Details AS I ON S.Pack_Centre = I.Pack_Centre AND S.ItemNumber = I.Item_Number
When I run it I get this error:
Does anyone know what I am doing wrong?
Thanks
Aaron

Answer 1

SELECT        S.ItemNumber, S.DeliveryWeek, S.Pack_Centre, S.Schedule_Qty, S.Delivered_Qty, S.PartPallet, I.Production_Reference, LEFT('I.Production_Reference',
                         CHARINDEX('/', 'I.Production_Reference') - 1) AS IntouchRef,
Hello Aaron,
Remove the single Hyphen around I.Production Reference, this it's treaten as a fix text, not as a column.
Just to test it:
DECLARE @test AS TABLE(MyValue varchar(30))
INSERT @test VALUES ('N132245-01/25')
INSERT @test VALUES ('N003424-132/28')
SELECT LEFT(MyValue, CHARINDEX('/', MyValue) - 1)
FROM @test
Olaf Helper
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