I have c开发者_开发百科ode that in the connection setup selects the database using mysql_select_db().
$link = mysql_connect('localhost', 'user', 'pass');
mysql_select_db("database1");
Can I later run a query against two databases such as:
SELECT database1.row, database2.row
FROM database1.table, database2.table
WHERE database1.row = database2.otherrow
even though "database1" was already selected at first? Or is there a method for unselecting the database?
You can. Also check this out: How do I construct a cross database query in PHP?
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