MySql行转列统计

方法一:

select request_date,user_name,
  max(case code when '成功' then count else 0 end) 成功数,
  max(case code when '失败' then count else 0 end) 失败数
from (select user_name,request_date,code,count(*) count
     from TEST_TB_GRADE
     group by user_name,request_date,code) src
group by request_date,user_name
order by request_date,user_name;

方法二：

select request_date,user_name,
  sum(case code when '成功' then 1 else 0 end) 成功数,
  sum(case code when '失败' then 1 else 0 end) 失败数,
  count(*) 总数
from TEST_TB_GRADE
group by request_date,user_name;