msql_select_db() sets the current active database on
the server that's associated with the specified
link_identifier.
Subsequent calls to msql_query() will be made on the active database.
database_nameThe database name.
link_identifierThe mSQL connection. If not specified, the last link opened by msql_connect() is assumed. If no such link is found, the function will try to establish a link as if msql_connect() was called, and use it.