Hi: I have a problem in that all statements that include concat execute very slowly. For instance, if I have three fields in string format that represent a year, month and day, and want to issue a select like:
select * from cxcmanpag where contact (year,month,day)<=stringYear+stringMonth+stringDay (simplified), then it will take a long time, againts a table with only around 100,00 records. If I rewrite the statement to read: select * from cxcmanpag where year<=stringYear and month<=stringMonth and day<=stringDay, it will execute considerable faster, but will not produce the same results. I have looked in the manual, and also read High Performance MySQL from Zawodny and Balling, and MySQL from Paul Dubois, but none of them seem to address this issue. Can somebody point me to a URL or book that I should be reading to improve, this, or how to avoid using concat altogether? Thank you. -- Alfredo J. Cole Grupo ACyC www.acyc.com - www.clshonduras.com - SolCom -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
