获取mysql中不同行的值

Question

我正在使用MySql，请参阅 http://postimg.org/image/waso0lsnf/ 查看我的表格结构。 我想要提取enduser_to_department = Y department_to_enduser = Y以及department_id.。 对于相同的SELECT `departments`.`department_id`, `departments`.`department` FROM `custom_forms_departments` , `departments` WHERE departments.department_id = custom_forms_departments.department_id AND (`custom_forms_departments`.`enduser_to_department` = 'Y' OR `custom_forms_departments`.`department_to_enduser` = 'Y') GROUP BY `departments`.`department_id` ORDER BY departments.department_id DESC

，值可能在不同的行中可用

我尝试过以下方式，但它适用于单行。

:inherited-members:

http://postimg.org/image/waso0lsnf/

修改：从网址添加图片。

Answer 1

在where子句中，您可以指定条件

enduser_to_departmen ='Y'和department_to_enduser ='Y'

而不是group by u可以使用distinct

Answer 2

试试这个：

    SELECT `department_id`
    FROM   `custom_forms_departments` 
    WHERE  `enduser_to_department` = 'Y'
    AND    `department_to_enduser` = 'Y'
    GROUP BY `departments`.`department_id` 
    ORDER BY departments.department_id DESC

编辑：现在不加入。

我刚刚为OR更改了AND，因为您希望它们都是＆＃39; Y＆＃39; ，并更改了联接。

Answer 3

希望这能解决你的问题

SELECT departments。department_id，departments。department 来自custom_forms_departments 左连接departments WHERE departments.department_id = custom_forms_departments.department_id AND（custom_forms_departments。enduser_to_department ='Y' 或custom_forms_departments。department_to_enduser ='Y'） ORDER BY departments.department_id DESC