Hi Anees, 1) For this, in your package, you need to package all kinds of libraries, mysql, mssql, odbc, etc.. 2) While installing, you can ask for the type of database the user wishes to have and write it into some config file. 3)While running your script (after installation is finished), based on the config file value, include only that db library. Just wanted to tell you that, for sql server, using stored procedures is an efficient way, instead of querying with big sql statements. MySQL can bare the sqlquery transport, but SQL server itself is very heavy loaded, and causes problems. So use stored procedures for your mssql installations. Bye, Manda Krishna Srikanth http://www.krishnasrikanth.com http://www.ksjournal.info php-objects@xxxxxxxxxxxxxxx wrote on 08/08/2007 11:37:39 PM: > Hi, > > I am interested in developing a web application to which I can > attach any of db like mysql,access,sql server,oracle ... as it is > there in most of projects where during the installation we select > any of optional db. > > > how to write such a code which can work with all of databases. > =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you [Non-text portions of this message have been removed]