如何在一个 mysql 字段中创建两个条件？

Question

对不起，我不知道如何措辞这个问题，它实际上比听起来要复杂一些。我的数据库中有以下内容；请看链接中的截图：

http://prntscr.com/utyopv

我正在使用 BIRT 生成一个报告，我希望当优先级 = 2 时，它显示一个“高”值。同样，当priority = 1时，它显示'Medium'，当它= 1时，它显示'Low'。

但我也希望当estimated_time = 4时，它显示'16+hrs'，当estimated_time = 3时，它显示'

现在我已经设法使用下面的代码实现了优先级；

SELECT date_created, CONCAT(first_name, " ", last_name) as user, e_name, cc_name, 'High' as priority, job_description, due_date, estimated_time, impediment
FROM job_planning as jp
INNER JOIN user as u
ON jp.user_id = u.id
INNER JOIN employer as e
ON jp.employer_id = e.id
INNER JOIN client_company as cc
ON jp.client_id = cc.id
WHERE jp.priority = '2'

union

SELECT date_created, CONCAT(first_name, " ", last_name) as user, e_name, cc_name, 'Medium' as priority, job_description, due_date, estimated_time, impediment
FROM job_planning as jp
INNER JOIN user as u
ON jp.user_id = u.id
INNER JOIN employer as e
ON jp.employer_id = e.id
INNER JOIN client_company as cc
ON jp.client_id = cc.id
WHERE jp.priority = '1'

union

SELECT date_created, CONCAT(first_name, " ", last_name) as user, e_name, cc_name, 'Low' as priority, job_description, due_date, estimated_time, impediment
FROM job_planning as jp
INNER JOIN user as u
ON jp.user_id = u.id
INNER JOIN employer as e
ON jp.employer_id = e.id
INNER JOIN client_company as cc
ON jp.client_id = cc.id
WHERE jp.priority = '0';

但是我怎样才能包括estimate_time？我可以在mysql中使用OR吗？我不能使用 AND，因为它会将两者分开。

感谢并感谢任何帮助。

Answer 1

SELECT ... , 

       CASE priority WHEN 2 THEN 'High'
                     WHEN 1 THEN 'Medium',
                     ELSE        'Low'
                     END AS verbal_priority,

       CASE estimated_time WHEN 4 THEN '16+hrs'
...