Question

我有以下“Active Record”设置：

$this->db->select('*');
$this->db->from('Orders');
$this->db->join('MPC_Agents', 'Orders.UserName = MPC_Agents.UserName', 'inner');    
$this->db->limit(50,20);
$query = $this->db->get();

使用$this->db->last_query(); mereley输出：

SELECT * FROM (Orders) INNER JOIN MPC_Agents ON Orders.UserName = MPC_Agents.UserName

为什么不适用这个限制？

Answer 1

MS Access SQL中没有限制。您可以选择Top：

SELECT Top 10 Id FROM Table Order BY Id

或

SELECT Top 10 Id FROM Table 
WHERE ID Not IN (SELECT Top 10 ID From Table ORDER BY Id)
Order BY Id

Answer 2

将您的限制放在查询的顶部并编辑为

 $this->db->limit(20,50);
 $this->db->select('*');
 $this->db->from('Orders');
 $this->db->join('MPC_Agents', 'Orders.UserName = MPC_Agents.UserName', 'inner');
 $this->db->get();

希望它能更好地运作

Access数据库的Codeigniter限制

2 个答案: