select * from table where company=A order by rand() limit 2
union
select * from table where company=B order by rand() limit 2
该语句可以实现 随机取出 AB公司各2条相关数据。
select * from table where company=A order by rand() limit 2
union
select * from table where company=B order by rand() limit 2
该语句可以实现 随机取出 AB公司各2条相关数据。
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