How can i use substring in SQL? [duplicate]

This question already has answers here: Closed 12 years ago.

Possible Duplicate:

开发者_C百科 How can I rearrange string with SQL?

Declare @CustTotalCount as int
Declare @CustMatchCount as int 
 select @CustTotalCount = count(*)  from ENG_CUSTOMERTALLY

 select @CustMatchCount = count(*)  from Task  where MPDReference in(
 select ENG_CUSTOMERTALLY_CUSTOMERTASKNUMBER from dbo.ENG_CUSTOMERTALLY)

if(@CustTotalCount>@CustMatchCount)
select distinct
 substring(ENG_CUSTOMERMYCROSS_MYTECHNIC_TASK_NO, charindex('-', ENG_CUSTOMERMYCROSS_MYTECHNIC_TASK_NO)
 + 1, 1000)
  from dbo.ENG_CUSTOMERMYCROSS where
 ENG_CUSTOMERMYCROSS_CUSTOMER_NUMBER in(
select ENG_CUSTOMERTALLY_CUSTOMERTASKNUMBER from ENG_CUSTOMERTALLY1
except
select MPDReference from Task )

i can convert below string data

• A320-200001-01-1(1)
• A320-200001-01-1(2)
• A320-200001-01-1(1)

TO

• 200001-01-1(1)
• 200001-01-1(2)
• 200001-01-1(1)

But i need

• 200001-01-1
• 200001-01-1
• 200001-01-1

distict ---> 200001-01-1 How can i do that SQL and C# ?

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I gave this answer in the duplicate question too.

Here's a technique that uses PATINDEX, which can use wild cards.

SUBSTRING(ENG_CUSTOMERMYCROSS_MYTECHNIC_TASK_NO,
        PATINDEX('%[0-9]%', ENG_CUSTOMERMYCROSS_MYTECHNIC_TASK_NO),
        PATINDEX('%(%', ENG_CUSTOMERMYCROSS_MYTECHNIC_TASK_NO)
                 - PATINDEX('%[0-9]%', ENG_CUSTOMERMYCROSS_MYTECHNIC_TASK_NO)
                )

The start for your substring is the position of the first numeric value (%[0-9]%). The length value is the position of the first parenthesis ('%(%') less the starting position.

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You could

SELECT DISTINCT SUBSTRING(....) FROM ...