i don't know but i quite sure not, because the cost to update all the row in the table Hash will be much much (much) more expensive ... and also this solution it's absolutely not multi thread :(
On 12/23/2010 11:46 PM, stormtrooper wrote: > would it run faster if you add two columns to the Hast table - randmax and > randmin > > update Hash set randmax = max((<#randomnumber> % 255)-10,0) > update Hash set randmin = min((<#randomnumber> % 255)+10,255) > > CREATE INDEX HASH_RMIN_IDX ON HASH (RANDMIN); > CREATE INDEX HASH_RMAX_IDX ON HASH (RANDMAX); > > Select > H1.ID > from > HASH1 H1 > where > x1_y1_min>= randmax and > x1_y1_max<= randmin and > x1_y2_min>= randmax and > x1_y2_max<= randmin and > x1_y3_min>= randmax and > x1_y3_max<= randmin and > x1_y4_min>= randmax and > x1_y4_max<= randmin and > x1_y5_min>= randmax and > x1_y5_max<= randmin; > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > > > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
