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?
答案 0 :(得分: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;
答案 1 :(得分:0)
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;