Question

I need to query the number of distinct items in a particular SQLite table and column. However, there are millions of rows, and I only care if there are more than 20 distinct items. Is there any way to put an early exit in the distinct/group by counter?

Answer 1

LIMIT must work

SELECT DISTINCT column1,column2
FROM table
WHERE column3='some value'
LIMIT 20

based on this, http://www.sqlite.org/lang_select.html