如何使用mysql codeigniter对两个表使用select查询

Question

I have two tables users and employers in mysql, I just want to get all records from both tables at same time.

How can I do this using codeigniter ?

Answer 1

According to your comment, you don't have relation between both tables, so you can get the data as like this cross join:

$this->db->select('users.*,employers.*'); 
$this->db->from('users,employers');
$query = $this->db->get();
return $query->result();

If you want to use LIKE clause then you can just add:

$this->db->like('users.entity', $search_keyword_here, "both"); // here both means '%your keyword%'
$this->db->or_like('users.skills', $search_keyword_here, "both"); // here both means '%your keyword%'

You can use or_like for employers table also.

Note that, when we use cross join it will produce result like (users no of rows *employers no of rows)

CI Query Builder

CI Database Reference

Answer 2

Try this sql query

SELECT table1.column1, table2.column2....(put all tables and columns name that you want to join)
FROM table1
FULL JOIN table2
ON table1.common_field = table2.common_field;

[or go to this site]

https://www.tutorialspoint.com/sql/sql-full-joins.htm