We have a mysql database of 2 Million Records at our server.
Out of this 2 Million Records 25% entries are duplicate .
We want to get rid of duplicate entries and that too very fast.
We have a program to remove duplicate entries but that is taking too much time , so we need some fast solution , I think someone of you can easily guide me how to remove it with 1-2 single sql commands only.
Here is the table structure
create table xxx
ID int unsigned not null auto_increment primary key,
Date datetime not null default '0',
Mainly We want to remove all the duplicate emails like if there are 2 rows with email address as pppp then remove the 2nd one from it .
If you can solve the problem now only then only make a bid.
1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.
2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables):
a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.
b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.
3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).