String within a String Count

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2.33/5 (2 votes)

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Is there a function that counts how many times a sub-string appears within the larger string.

Example: "Recover your contacts on your phone system"

The function would need to tell me how many times "your" appears in the string; which would be 2.

Posted 10-May-13 10:47am

Runner55Code

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Sergey Alexandrovich Kryukov 10-May-13 16:58pm

How can this be related to database? You could better do it in your application's language.
—SA

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RaisKazi · Answer 1 · 2013-05-10T10:58:00

Solution 1

Have a look at below simmilar Question-Answer thread.

http://www.postgresql.org/message-id/20091020172452.GA10593@tux

Hope it helps.

Posted 10-May-13 10:58am

RaisKazi

Comments

Maciej Los 10-May-13 17:44pm

+5

RaisKazi 10-May-13 21:21pm

Thank you Maciej, :).

Runner55Code · Answer 2 · 2013-05-10T11:23:00

(Length('Find your own way in your own world') - Length(Replace('Find your own way in your own world','your',''))) / Length('your')

...which correctly returned 2.

This seemed to work better than the one suggested on the PostgreSQL web site...

Length('Find your own way in your own world') - Length(regexp_replace('Find your own way in your own world','your','','g')) / Length('Find your own way in your own world')

...which returns 35 (...this may have something to do with the 'g' in the expression but it's not explained do I just left it.)