db_query_range() db_query() 区别 有大用

db_query_range()  //它有 $from, $count ,这两个指定范围
db_query()

function db_query_range($query, $from, $count, array $args = array(), array $options = array()) {
  if (empty($options['target'])) {
    $options['target'] = 'default';
  }

  return Database::getConnection($options['target'])->queryRange($query, $from, $count, $args, $options);
}

function db_query($query, array $args = array(), array $options = array()) {
  if (empty($options['target'])) {
    $options['target'] = 'default';
  }

  return Database::getConnection($options['target'])->query($query, $args, $options);
}