negative,numbers,with,SUBSTR,functions,Oracle
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Reverse SUBSTR clip

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Submitted on: 4/15/2001 4:28:53 AM
By: Jason  
Level: Beginner
User Rating: By 1 Users
Compatibility:Oracle

Users have accessed this article 5893 times.
 
 
     You can use negative numbers with the SUBSTR functions in Oracle.

 
 
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Normally you would use a SUBSTR function to clip out sub-strings of data. This would be in the form of "SUBSTR (Phone, 5)" which would eliminate the area code of a list of phone numbers. This works fine if you know the length of data being queried. If you have a column of data that has variable lengths and you only want the last 4 characters you can use a negative number with your query. "SUBSTR(Var_data, -4)" will return only the last 4 characters in your column regardless of the data length. This method saves time and computation cycles because you do not have to check data lengths before doing SUBSTR functions.

 
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Other User Comments
5/9/2001 6:58:54 PM:Foofoo
Slick, that'll come in handy. Thanx.
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5/14/2002 8:03:43 AM:vilas
What is new in that?? I think this is known by all SQL programmer.
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