改进MySQL Query以获取记录

Question

我有一个名为progress的表，它为客户和成员存储不同类型的进度;

我有一个MYSQL查询，它假设从客户端到成员和成员到客户端获取进度数据。目前我有以下方式查询;

SELECT * 
FROM progress
WHERE (client = 'XXXX' AND member = 'YYYY') 
    OR (client = 'YYYY' AND member = 'XXXX') 

它为我提供了我想要的结果，但是如何根据其编写方式改进此查询。

请帮助，非常感谢任何帮助。

提前谢谢

Answer 1

正如Barmar在评论It can't get much simpler中所说，但根据你写这个问题的问题，你有一些选择：

您可以使用UNION

select * from progress where (client = 'xxxx' and member = 'yyyy') 
 union all
select * from progress where (client = 'yyyy' and member = 'xxxx')

您可以使用IN语句

select * from progress
 where (client) in ('XXXX','YYYY')
   and (member) in ('YYYY','XXXX');

您可以使用自己的解决方案。

修改

忘记添加小提琴：http://sqlfiddle.com/#!2/74e6ec/7

Answer 2

尝试使用联盟。

SELECT * FROM progress WHERE (client = 'XXXX' AND member = 'YYYY') 
UNION ALL
SELECT * FROM progress WHERE (client = 'YYYY' AND member = 'XXXX')