[英]Query Sort Order Issue
我有两个查询,我进一步对它们进行了合并以获得不同的结果。 当前,它们按名称按字母顺序排序。
查询1:
Corporate Comp D
Corporate Comp E
查询2:
Corporate Comp A
Corporate Comp B
Corporate Comp D
Corporate Comp E
Corporate Comp G
因此,在合并后,结果为ABDE G.及其按字母顺序排列的顺序,但是,我希望通过第一个查询对其进行排序,所以基本上我希望该顺序像
最终排序查询
Corporate Comp D
Corporate Comp E
Corporate Comp A
Corporate Comp B
Corporate Comp G
在这种情况下,请勿使用UNION
。 这是一个替代方案:
select qq.col
from ((select q.col, 1 as which
from query1 q
) union all
(select q.col, 2 as which
from query2 q
where not exists (select 1 from query1 q1 where q1.col = q.col)
)
) qq
order by qq.which, qq.col;
或者,您可以使用聚合:
select qq.col
from ((select q.col, 1 as which
from query1 q
) union all
(select q.col, 2 as which
from query2 q
)
) qq
group by qq.col
order by min(qq.which), qq.col;
您可以尝试以下方法:
select
*
from
(
select col from query1
union
select col from query2
) d
order by
case when col in (select col from query1) then 0 else 1 end,
col
select col
from ( select distinct 1 as i,col from query1
union all (select 2,col from query2 minus select 2,col from query1)
) t
order by i,col
;
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