codeigniter 中的 INNER JOIN ON 条件

Question

这是我的 mysql 查询

SELECT MAX(A.BID),B.* 
  FROM tbl_bid A 
 INNER 
  JOIN wl_customers B 
    ON A.customers_id=B.customers_id
 WHERE portfolio_id='$Id'

如何在 codeigniter 中编写此查询。

Answer 1

你也可以试试。 这也可以是其中一种方式

     $this->db->select('MAX(A.BID),wl_customers.*');
     $this->db->from('tbl_bid');
     $this->db->join('wl_customers ','tbl_bid.customers_id=wl_customers.customers_id');
     $this->db->where('portfolio_id',$Id,false)
     $result = $this->db->get();

Answer 2

就像是

$this->db->select('MAX(A.BID),B.*')
->join('wl_customers as B','A.customers_id=B.customers_id')
->where('portfolio_id',$Id)
->get('tbl_bid as A')
->row();

Answer 3

试试这个查询。 它可能对你有帮助：

$this->db->select("B.*","MAX(A.BID)")
            ->from("tbl_bid A")
            ->join("wl_customers B","A.customers_id=B.customers_id")
            ->where("portfolio_id",$Id)->get()->result();