如何在一个 mysql 字段中创建两个条件？

Question

抱歉，我不知道如何表达这个问题，实际上它比听起来要复杂一点。我的数据库中有以下内容；请查看 link:

中的屏幕截图

我正在使用 BIRT 生成报告，我希望当优先级 = 2 时，它显示值 'High'。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 时显示“16+hrs”，当 estimated_time = 3 时显示“< 16 小时”等等

现在我已经使用下面的代码设置了优先级；

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';

但是我怎样才能包含 estimated_time？我可以在 mysql 中使用 OR 吗？我不能使用 AND，因为那样会把两者分开。

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'
...

如何在一个 mysql 字段中创建两个条件？

How do i create two conditions in one mysql field?

mysql

eclipse

mysql-workbench

birt