Question

i m developing an ipad app for hospital management were information is filled in the user interface and on the click of a button the data is to be transfered to an external database(which later be viewed)…what are the steps required

Answer 1

You need to set up a webservice (like Saurabh said), for instance a PHP file using an mySQL connection would do fine.

To post the data (unsecured) to the service you can dome something like this:

NSString *post = @"key1=val1&key2=val2";
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:@"http://www.someurl.com"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-    Type"];
[request setHTTPBody:postData];

NSURLConnection *conn=[[NSURLConnection alloc] initWithRequest:request delegate:self];

Read the NSURLConnection documentation