join/inner join/outer join区别

有时候需要给表取个别名 比如把 basedata.new_500_1516015756000 叫做a，否则会出现错误

select a.query,a.winfoid,b.searchid from basedata.new_500_1516015756000 a

LEFT OUTER JOIN basedata.fc_shitu_wise b

on event_day = '20180101'

and a.query = b.query

and a.winfoid = b.winfoid

limit 1000