sqlite3, qmarks, and NULL values

MRAB google at mrabarnett.plus.com
Wed May 20 02:54:08 CEST 2009

Mitchell L Model wrote:
> Suppose I have a simple query in sqlite3 in a function:
>     def lookupxy(x, y):
>         conn.execute("SELECT * FROM table WHERE COL1 = ? AND COL2 = ?",
>                      (x, y))
> However, COL2 might be NULL. I can't figure out a value for y that would retrieve rows for which COL2 is NULL. It seems to me that I have to perform an awkward test to determine whether to execute a query with one question mark or two.
Have you tried None, ie lookupxy(x, None)?

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