Cross database joins

2007-11-26 Thread Eric Frazier
Hi, I found one thread on this that included some people's opinions, but I haven't been able to find anyone who has actually done some performance testing to see if there is a cost and what that cost is to doing cross database joins. I do tend to want to keep everything in one

Re: cross database joins performance hit?

2004-10-13 Thread Gary Richardson
I've worked on projects before where splitting up the schema into databases was used. Joins across DB's are fine, but there is another place that the performance can hit you. If you use something like perl's Apache::DBI, you will increase the number of open connections to your database. That's ass

Re: cross database joins performance hit?

2004-10-13 Thread Harald Fuchs
In article <[EMAIL PROTECTED]>, "Jason" <[EMAIL PROTECTED]> writes: > I've tried to find references to if there are any design flaws with using > multiple databases or not however was unable to locate anything (but I was > told by a previous co-worker that there were performance hits). > Are ther

cross database joins performance hit?

2004-10-12 Thread Jason
I've tried to find references to if there are any design flaws with using multiple databases or not however was unable to locate anything (but I was told by a previous co-worker that there were performance hits). Are there any performance hits or design flaws by separating a large database into

Re: Cross-database joins

2002-04-05 Thread Dormition Skete
Many thanks. You filled in the missing piece for me. It appears to be working... at least with both databases on the same MySql server. I hope that putting one db on the file server and one locally does not prove to be problematic (that issue never occurred to me), but if worse comes to worse,

Re: Cross-database joins

2002-04-05 Thread Richard
that > >> are in different databases? > >> > >> I have a couple of Delphi database programs that use Paradox tables. I'd > >> like to move them over to something else that is faster. These > >>programs are set > >> up so that they have

Re: Cross-database joins

2002-04-05 Thread Paul DuBois
e in different databases? >> >> I have a couple of Delphi database programs that use Paradox tables. I'd >> like to move them over to something else that is faster. These >>programs are set >> up so that they have a shared database on our server, and then a >&

Re: Cross-database joins

2002-04-05 Thread Richard
x tables. I'd > like to move them over to something else that is faster. These programs are set > up so that they have a shared database on our server, and then a local database > on each machine. I have queries that have to be able to join tables in the > local and the server db

Cross-database joins

2002-04-05 Thread Dormition Skete
hared database on our server, and then a local database on each machine. I have queries that have to be able to join tables in the local and the server db's. I tried this with Interbase, and it doesn't support cross-database joins. I'm wondering if MySql can do this? If so, how