日期:2014-05-19  浏览次数:20430 次

请教sql统计的一个写法
表的结构如下

proname           kind
a                         1
b                         1
c                         1
d                         2
e                         2
f                         2

我的问题是:
如何统计出kind的个数?

谢谢



------解决方案--------------------
冒充名字来忽悠啊!哈哈!
如果你要统计kind有几种;
select count(*) from (select distinct kind from tb) TA
------解决方案--------------------
求和就用SUM
------解决方案--------------------
看不懂要求什么,
如果要求kind的总和
select sum(kind) from table

如果要求kind有多少种
select count(*) from (select kind from table group by kind) a

------解决方案--------------------

select kind,count(1) as num from tblname
group by kind
order by num
------解决方案--------------------
select kind , count(kind) from #table group by kind
------解决方案--------------------
select kind,count(1) as 出现次数 from @t group by kind
------解决方案--------------------
select kind , count(kind) from a group by kind
--------------------------------------------
select kind from #table
order by kind
compute count(kind) by kind
--------------------------------

上面的都可以~
------解决方案--------------------
select sum(kind) from table
------解决方案--------------------
select kind,count(1) from table group by kind