Hello! В сообщении от Monday 18 August 2008 20:21:04 Thomas Sailer написал(а): > The following query is very quick, it returns 20 rows within a small > fraction of a second: select * from mapelements_rtree where NELAT>=79000000 > and SWLAT<=80000000 and NELON>=79000000 and SWLON<=80000000; > > The following query, however, takes a long time (almost half a minute): > select * from mapelements,mapelements_rtree where > mapelements_rtree.NELAT>=79000000 and mapelements_rtree.SWLAT<=80000000 and > mapelements_rtree.NELON>=79000000 and mapelements_rtree.SWLON<=80000000 and > mapelements.ID=mapelements_rtree.ID;
Try the query: select * from mapelements where ID in (select ID from mapelements_rtree where NELAT>=79000000 and SWLAT<=80000000 and NELON>=79000000 and SWLON<=80000000); Best regards, Alexey. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
