sqlite - Android SQLiteDatabase delete function -


i have 1 strange situation sqlitedatabase.delete function

this don't delete null records:

sqlitedatabase.delete(table, "ifnull(field, 0) = ?", new string[]{"0"});

this delete null records without problems:

sqlitedatabase.execsql("delete table ifnull(field, 0) = 0");

can explain me, why in first case null records not deleted?

0 number, "0" string. values of different types not equal.

the android database api not allow use type other string parameters delete(). if want put number sql statement, not use parameter insert directly.


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