How do I use regex in a SQLite query?

Question

I\'d like to use a regular expression in sqlite, but I don\'t know how.

My table has got a column with strings like this: \"3,12,13,14,19,28,32\" Now if I type \"whe

Answer 1

With python, assuming con is the connection to SQLite, you can define the required UDF by writing:

con.create_function('regexp', 2, lambda x, y: 1 if re.search(x,y) else 0)

Here is a more complete example:

import re
import sqlite3

with sqlite3.connect(":memory:") as con:
    con.create_function('regexp', 2, lambda x, y: 1 if re.search(x,y) else 0)
    cursor = con.cursor()
    # ...
    cursor.execute("SELECT * from person WHERE surname REGEXP '^A' ")