If all 2,400 tables have the same 9 columns you could try using a single table and adding a column for the ticker of the stock and then add an index to that column to allow quick lookups based on the ticker.
-Jeff On Tue, Aug 19, 2008 at 9:44 AM, .:UgumugU:. <[EMAIL PROTECTED]> wrote: > Hi cstrader, > > Just send some table structure and the explain what you are trying todo. > In my opinion it is not a good way to deal with 2400 tables :) > > ugumugu > > cstrader yazm?s,: >> I'm just starting with SQLite (from vb.net) and could use some advice. >> >> I have a set of 2400 (could get substantially higher) tables in a single >> database (each table contains daily stock prices for a different stock). >> Each table has 9 columns (all text for now) and some several thousand rows. >> So far so good. >> >> I need to read those tables sequentially and operate on them. It takes >> about 18 seconds to open each of the tables in sequence. (i.e. loop >> through 2400 tables with a select command opening each one) >> >> First question... does that sound about right in terms of speed? Is there a >> way to store the data that might be faster? The data are primarily single >> precision -- I'm using text format, but perhaps that's not best? >> >> Second question: >> >> When I open each table I need to add some blank columns to it. So I include >> some "0 as NewCol" lines to create the new columns with initial 0s. >> >> However, adding 20 new columns in this manner increases the total time for >> the loop from 19 seconds to 49 seconds. This seems like a long time. Is >> there a faster way to get these empty columns in? >> >> More questions later I'm sure... >> >> Thanks in advance >> >> cs >> >> _______________________________________________ >> 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 > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
