可以使用条件聚合和 union all 具体如下：

select name_new, 
       max(case when name = 'PersonA' then A end) as PersonA,
       max(case when name = 'PersonB' then A end) as PersonB,
       max(case when name = 'PersonC' then A end) as PersonC
from 
(select name, 'A1' name_new, A1 A from mytable union all
select name, 'A2' name_new, A2 A from mytable union all
select name, 'A3' name_new, A3 A from mytable union all
select name, 'A4' name_new, A4 A from mytable ) t
group by name_new

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