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Combining mysql_select_db() and mysql_query()

The PHP MySQL API includes a function that is able to group the selection of a database and a query against that database. This function is called mysql_db_query() and can be used in place of mysql_select_db() and
mysql_query(). The syntax for the proper way to use this command is:

$query_result = mysql_db_query($db_name, $query, $link_id);

... or without the $link_id variable ...

$query_result = mysql_db_query($db_name, $query);
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