How to get only numerical values in rows?

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I have one table containing few rows like

column
abc1
23abc
4nm

I want output like this

column
1
23
4

only numerical values

What I have tried:

select isnumeric(string)

but it is not going to help me out..

please help me on this

Posted 26-Apr-16 21:41pm

Member 11337367

Updated 26-Apr-16 22:03pm

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Sergey Alexandrovich Kryukov 27-Apr-16 3:45am

This question is just the indication of wrong database schema design. Do you have an option to redesign it?
You need to keep numerical data in separate columns(s) and never use strings to represent numeric data.
—SA

2 solutions

Solution 2

It's a poor idea, because it's going to take significant server resources each time you do it: If you have a large number of rows (or do this frequently) you are going to waste a lot of Server processing time!
I'd recommend that either you allocate a second column which holds only the numeric values and insert that when you insert the other column, or do this in your presentation language where a simple regex will do it and distribute the load across different machines.

But...you can do it: tsql - T-SQL select query to remove non-numeric characters - Stack Overflow[^] - see the SQL function given by eDriven_Levar at the bottom.
I really don't recommend it though.

Posted 26-Apr-16 22:03pm

OriginalGriff

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Member 12003400 · Accepted Answer · 2016-04-26T21:50:00

For example if your table name is tbltest and column name is columntest, your query will be like following,

SELECT LEFT(subsrt, PATINDEX('%[^0-9]%', subsrt + 't') - 1)
FROM (
SELECT subsrt = SUBSTRING(columntest, pos, LEN(columntest))
FROM (
SELECT columntest, pos = PATINDEX('%[0-9]%', columntest)
FROM tbltest
) d
) t