Basically just use:
PHP Code:
$db->query_read("SELECT * FROM table_name WHERE clause = condition");
PHP Code:
$db->query("DELETE FROM table_name WHERE clause = condition");
PHP Code:
$db->query("UPDATE table_name SET column = 'value' WHERE clause = condition");
PHP Code:
$db->query("INSERT INTO table_name (column, column, column) VALUES (bla, bla, bla)");
That's pretty much it. Use query_first to generate arrays.