What is the function Substring doing SUBSTRING(CUST_ID.ID_DESC, 3, 2) AS Terr,

Can someone give me a greakdown of what it is doing.
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Brian CroweDatabase AdministratorCommented:
Extract a string 2 characters long from the CUST_ID.ID_DESC column value starting with the third character.

http://technet.microsoft.com/en-us/library/ms187748.aspx
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HabibOSUCommented:
You should take a look at Substring - MSDN

This in your code takes three parameters, first one is the expression in your case its the column "CUST_ID.ID_DESC", the second parameter is the start index, Which is 3, and the third parameter is the number of  characters to be retrieved. Consider the following exmple

SELECT SUBSTRING('Test value', 3, 2) AS Terr

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This would return "st", since the index starts with `1`, (not 0 like C# or Java), at index 3 it finds "s" and from that position in takes 2 character so the result is "st" and the returned column is aliased as "Terr"
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RUA Volunteer2?Tableau Trainer & Consultant Sales Exec.Author Commented:
That is exactly what I thought it would do. Just wanted to verify from the experts. Never hurts to hear it from the pros.
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Microsoft SQL Server 2008

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