sql - How to change my Query to a single command in MySql? -

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my order has 2 fields called buyerid , sellerid. want both id according same condition, can use 2 search statements union them, have search them 2 times. how search them 1 time in 1 select statement? statement is:

select sellerid order status=2 , createtime>'2015-05-25 8:00:00'  union select buyerid order status=2 , createtime>'2015-05-25 8:00:00'

how change them 1 statement?

-- try change equal above,but wrong. select (buyerid+sellerid) order status=2 , createtime>'2015-05-25 8:00:00'

this you're looking for, if understood right:

select q.id  (select sellerid id, status, createtime order  union select buyerid id, status, createtime order) q  status=2 , createtime>'2015-05-25 8:00:00'

i'd still go first attempt, not sure wether solution more efficient.


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