Postgres SQL string matching in where

Question

What's the simplest way to write a SQL query (postgres) for the following: I have an adress table, that has a streetnumber column. That can contain digits and letters. And I if an argument is say '3' I want to return rows with values starting with three followed by something that is not a digit. So for example rows with streetnumber values 3, 3A, 3 A, but not 33.

Answer 1

You can use matching using regular expressions .

The query may look like the following:

SELECT * FROM table WHERE streetnumber ~ '3[^0-9]*'

The regular expression pattern 3[^0-9]* matches " digit 3 followed by zero or more characters which are not a digit ".