Hi Christophe, On 6/4/08, Christophe Leske <[EMAIL PROTECTED]> wrote: > .............. > AND (latitude_DDS BETWEEN 44.261771 and 44.424779)
You might want to check if you can somehow store this data *without* the decimal point (with the point implied - counting six digits from right to left) and use *integer* mathematical operators to do the maths. > someone suggested to divide up the tables - something which led me to > the idea to create different views for each class_dds value: > create view Level1 as Select * from cities where class_dds=1 > .................. > So i could do select statements like: > > select * from Level1 > Union > select * from Level2 > ....................... Perhaps he meant "partitioning" when he said "dividing" and he was coming from an Oracle background or something ??? This is because UNIONs are ALWAYS slow unless you are using a higher end RDBMS such as Oracle where you can take special measures to speed up union using the Oracle provided facilities. -- Best regards, Asif _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
