-- { echoOn }
SELECT f1, f2['2'], count() FROM t1 GROUP BY 1,2 order by 1,2;
1		1000111
SELECT f1, f3['2'], count() FROM t1 GROUP BY 1,2 order by 1,2;
1		1000111
SELECT f1, f4[2], count() FROM t1 GROUP BY 1,2 order by 1,2;
1	0	1000111