在Sql Server中选择Rows作为列

Question

我有以下表格：

id  configname      value
--------------------------------------
1   set_count       3         
2   pass_ratio      2         
3   min_right_count     1         
.
.
.

我需要创建选择查询，以这种方式给出结果：

set_one_count   pass_ratio  min_right_count
--------------------------------------------------------
3                    2               1

有什么想法吗？

Answer 1

试试这个：

修改检查一下以获取更多SQLFiddle

select set_ratio,pass_ratio,min_right_count
from
(
  select configname,value
  from yourtable
) d
pivot
(
  max(value)
  for configname in (set_ratio,pass_ratio,min_right_count)
) piv;

Answer 2

SQLFiddle Demo

select 
sum(case when configname='set_count' then 1 else 0 end) as set_one_count,
sum(case when configname='pass_ratio' then 1 else 0 end) as set_one_count,
sum(case when configname='min_right_count' then 1 else 0 end) as min_right_count
from tablename;