Normally, you can't check to see if a database is there
before making a connection. Remember that you make a
connection to a database
server, one that has
zero or more databases available. It's the same that you
cannot determine whether a URL exists without contacting
the server; you can't determine whether an email address
exists without asking the appropriate server; and you can't
determine whether you still have ice-cream without opening
the freezer.
There are of course exceptions. If you have access to the
machine the MySQL server runs on, you have the appropriate
permissions, you know where the server keeps its datafiles,
and you know the structure of said files (and directories),
you can find out. You also might be able to find out whether
the database exists by peeking in the appropriate log file.
Abigail
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