关于SQL表的行列转换
DateStatus2012-05-09win2012-05-09lose2012-05-09lose2012-05-09lose2012-05-10win2012-05...
Date Status
2012-05-09 win
2012-05-09 lose
2012-05-09 lose
2012-05-09 lose
2012-05-10 win
2012-05-10 lose
2012-05-10 lose
如果要生成下列结果，该如何写SQL语句？
Date win lose
2012-05-09 2 2
2012-05-10 1 2 展开
2012-05-09 win
2012-05-09 lose
2012-05-09 lose
2012-05-09 lose
2012-05-10 win
2012-05-10 lose
2012-05-10 lose
如果要生成下列结果，该如何写SQL语句？
Date win lose
2012-05-09 2 2
2012-05-10 1 2 展开
展开全部
select date,
sum(case when status='win' then 1 else 0 end)win,
sum(case when status='lose' then 1 else 0 end)lose
from tb group by date
本回答由提问者推荐
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
