グループ最大（ケース）及び（ケース）状況で

Question

は、クエリによってグループがthe linkで利用可能なファイルに示されている方法は、結果を表示するために使用することができる方法

select 
max(case when label in (value_1) then value else null) as "value_a" 
    (case when label in (value_2) then value else null) as "value_b" 
    (case when label in (value_3) then value else null) as "value_c" 
    (case when label in (value_4) then value else null) as "value_d" 
max(case when label in (value_5) then value else null) as "value_e" 
from table; 

が含まれるのでしょうか？

Answer 1

私が正しく理解している場合は、各列に値の一覧が必要です。クエリは `引き上げるよう集計関数を使用していないあなたが選択された用語と` value_b`、 `value_c`と` value_d`行の間のすべてのカンマが欠落している

with t as (
     select t.*, 
      dense_rank() over (order by a desc) as seqnum_a, 
      dense_rank() over (order by b desc) as seqnum_b, 
      dense_rank() over (order by c desc) as seqnum_c, 
      dense_rank() over (order by d desc) as seqnum_d, 
      dense_rank() over (order by e desc) as seqnum_e 
     from t 
    ) 
select seqnum, max(a) as a, max(b) as b, max(c) as c, max(d) as d, max(e) as e 
from ((select distinct seqnum_a as seqnum, a, NULL as b, NULL as c, NULL as d, NULL as e 
     from t 
    ) union all 
     (select distinct seqnum_b, NULL, b, NULL as c, NULL as d, NULL as e 
     from t 
    ) union all 
     (select distinct seqnum_c, NULL, NULL as b, c, NULL as d, NULL as e 
     from t 
    ) union all 
     (select distinct seqnum_d, NULL, NULL as b, NULL as c, d, NULL as e 
     from t 
    ) union all 
     (select distinct seqnum_e, NULL as a, NULL as b, NULL as c, NULL as d, e 
     from t 
    ) 
    ) abcde 
group by seqnum 
order by seqnum;