Improve company productivity with a Business Account.Sign Up

  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 732
  • Last Modified:

SQL extract number of a string


I use this function to exctract number out of a string, it worked great until somebody put the
word 'Inc.'  instead of a number the '.' created a problem and generate an error:

declare @param varchar(50)
select Left(SubString(@param, PatIndex('%[0-9.-]%', @param), 8000), PatIndex('%[^0-9.-]%', SubString(@param, PatIndex('%[0-9.-]%', @param), 8000) + 'X')-1)

Thanks for the help
1 Solution
If you only need to worry about accounting for the period just wrap the SELECT value in a REPLACE targeting the period.  It's not particularly elegant, but it works :)

declare @param varchar(50)
select @param = 'Inc.'
select REPLACE(Left(SubString(@param, PatIndex('%[0-9.-]%', @param), 8000),PatIndex('%[^0-9.-]%',
	SubString(@param, PatIndex('%[0-9.-]%', @param), 8000) + 'X')-1),'.','')

Open in new window

arnololo123Author Commented:
Well the problem with this approach is that the value 3.25 for example would be stripped of the period.
Is it feasible for you to use a second variable in the function?  If so you can cut down on the code by evaluating a variable after the evaluation.

declare @param varchar(50), @param2 varchar(50)
select @param = '3.25'
select @param2 = Left(SubString(@param, PatIndex('%[0-9.-]%', @param), 8000),PatIndex('%[^0-9.-]%',
	SubString(@param, PatIndex('%[0-9.-]%', @param), 8000) + 'X')-1)
select (CASE @param2 WHEN '.' THEN '' ELSE @param2 END)

Open in new window

Scott PletcherSenior DBACommented:
declare @param varchar(50)
select Left(SubString(@param, PatIndex('%[^a-z][0-9.-]%', @param), 8000), PatIndex('%[^0-9.-]%', SubString(@param, PatIndex('%[^a-z][0-9.-]%', @param), 8000) + 'X')-1)
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

What Kind of Coding Program is Right for You?

There are many ways to learn to code these days. From coding bootcamps like Flatiron School to online courses to totally free beginner resources. The best way to learn to code depends on many factors, but the most important one is you. See what course is best for you.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now