Hi All,
I am working with MYISAM tables split by year, like: data2003, data2004, data2005, data2006, data2007, data2008, all having the same definitions. To speed up the query process, I also defined MERGE tables, like: CREATE TABLE data20032004 ... ENGINE=MERGE UNION (data2003, data2004); CREATE TABLE data20032005 ... ENGINE=MERGE UNION (data2003, data2004, data2005); CREATE TABLE data20032006 ... ENGINE=MERGE UNION (data2003, data2004, data2005, data2006); CREATE TABLE data20032007 ... ENGINE=MERGE UNION (data2003, data2004, data2005, data2006, data2007); CREATE TABLE data20032008 ... ENGINE=MERGE UNION (data2003, data2004, data2005, data2006, data2007, data2008); CREATE TABLE data20042005 ... ENGINE=MERGE UNION (data2004, data2005); etc. etc. CREATE TABLE data20072008 ... ENGINE=MERGE UNION (data2007, data2008); For example, if a user query applies to 2003..2006, my app selects the belonging MERGE table data20032006, excluding tables data2007 and data2008 for faster results. Is this assumption correct ? Or are there better ways of doing this ? I'm using: mySQL version 5.0.15-NT TIA, Cor