"Not working" can mean many things. Here are a few common problems:
- MySQL service will not start.
- The service starts, but no programs can connect. Make sure that the user has permissions to connect to the server.
- Queries that worked in earlier versions no longer work. MySQL implemented a few syntax changes with version 5. Of particular note is the change in JOIN syntax.
See also the upgrade guide.
Dig Deeper on Open source databases
Related Q&A from Scott Noyes
Get suggestions for choosing MySQL character sets and field collations from expert Scott Noyes.continue reading
A MySQL expert describes two ways that the multi-master support can be used.continue reading
An expert describes where to find information on detection deadlock algorithms in MySQL.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.