Question

如何使用join righ ?????

将简单查询写入codeigniter查询

$query = $this->db->query("Select staff_permissions_list.perm_type,staff_permissions_list.permission_key,staff_permissions_list.permission_label,
        staff_permissions_list.id, staff_role_permissions.permission_id as p_id,staff_role_permissions.role_id
                                FROM staff_role_permissions 
                                RIGHT JOIN staff_permissions_list ON staff_role_permissions.permission_id=staff_permissions_list.id 
                                AND staff_role_permissions.role_id=$id WHERE staff_permissions_list.perm_type=0
                                ORDER BY staff_permissions_list.id ASC
                                ");
                if ($query->num_rows() > 0) {
                    return $query->result_array();
                }

Answer 1

$this->db->select('book_id, book_name, author_name, category_name');
$this->db->from('books');
$this->db->join('category', 'category.category_id = books.category_id', 'right');
$query = $this->db->get();

您可以使用右连接方法获取数据

Answer 2

那怎么样？

interface MyFunctionType { (resource: string | Resource): Something }

// a Mapped Type to fix methods, used in place of a interface
type FixedMethods<T extends string> = {
    [k in T]: MyFunctionType
}

class MyClass implements FixedMethods<"someMethodThatConforms" | "anotherMethodThatConforms"> {
    someMethodThatConforms(resource: string | Resource) {
        // this method will fail type check, until we return a Something
        return 1;
    }

    // it also complains about lack of "anotherMethodThatConforms" method
}

我将role_id放到where部分 - 也许你需要把它放回去（不知道你想在这里实现什么）

如何使用join right将简单查询写入codeigniter查询

2 个答案: