select id,姓,姓 as 姓名 from t1 where Flag=false union all select t1.id,t1.姓,t1.姓 & t2.名 from t1 inner join t2 on t1.id=t2.id order by 1,2,3
select t1.*,t2.名,t1.姓 & t2.名 from t1 inner join t2 on t1.id=t2.id
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