需要sql查询以下场景

Question

表包含：

c1   c2   c3   c4   c5
da1  Null Null db1  dc1
da1  dx1  Null db1  dc1
da1  Null dy1  db1  Null

所有字段都是varchar。

我需要一个查询，结果数据没有任何空值并且在一行中 “da1 dx1 dy1 db1 dc1”

Answer 1

select 'da1', 'dx1', 'dt1', 'db1', 'dc1' from thattable limit 1

应该完美地运作

Answer 2

随着细节的传递：

select max(c1), max(c2), max(c3), max(c4), max(c5)
from yourtable;

通过MGA查看here模拟。

Answer 3

试试这个。

select * from (select distinct c1, c2, c3, c4, c5 from mytable) as mytab where c1 is not null and c2 is not null and c3 is not null and c4 is not null and c5 is not null