Mysql IN statement query

grammar:

WHERE column IN (value1,value2,...)
WHERE column NOT IN (value1,value2,...)

1. After in is a recordset, such as:

select  *  from  table  where   uname  in(select  uname  from  user); 

example:

SELECT * FROM article WHERE uid IN(SELECT uid FROM user WHERE status=0)
In this SQL example, we implement to find all articles of all users whose status is 0 (possibly banned). First get all users with status=0 through a query:

2. In is followed by a string, such as:

select  *  from  table  where   uname  in('aaa',bbb','ccc','ddd','eee',ffff''); 

Note: The string must be marked with single quotes '' here;

3. After in is an array, use the following methods, please refer to:

$list is ' 1 , 2 , 3 , 4 , 5 '

 foreach (explode(',', $list) as $value) {
       $rules=$rules."'".$value."',";
  }
 $arr = $this->db->selectAll('slim_auth_rule'," id IN (".$rules."'')",'id,title');