只有一个表
create table FS
(
Id int primary key identity(1,1),
Dates date not null,
fs char(2) not null,
)
insert into FS values('2011-05-01','胜')
insert into FS values('2011-05-02','胜')
insert into FS values('2011-05-01','负')
insert into FS values('2011-05-02','胜')
insert into FS values('2011-05-01','负')怎样用sql语句查询出按日期分组胜负数各是多少啊。不知道给位看的明白不,我描述的这个。大家帮帮忙啦。
create table FS
(
Id int primary key identity(1,1),
Dates date not null,
fs char(2) not null,
)
insert into FS values('2011-05-01','胜')
insert into FS values('2011-05-02','胜')
insert into FS values('2011-05-01','负')
insert into FS values('2011-05-02','胜')
insert into FS values('2011-05-01','负')怎样用sql语句查询出按日期分组胜负数各是多少啊。不知道给位看的明白不,我描述的这个。大家帮帮忙啦。
create table FS
(
Id int primary key identity(1,1),
Dates datetime not null,
fs char(2) not null,
)
insert into FS values('2011-05-01','胜')
insert into FS values('2011-05-02','胜')
insert into FS values('2011-05-01','负')
insert into FS values('2011-05-02','胜')
insert into FS values('2011-05-01','负')SELECT Dates,
sum(CASE WHEN fs='胜' THEN 1 ELSE 0 END) AS 胜的数量,
sum(CASE WHEN fs='负' THEN 1 ELSE 0 END) AS 负的数量
FROM FS GROUP BY Dates
/*
Dates 胜的数量 负的数量
----------------------- ----------- -----------
2011-05-01 00:00:00.000 1 2
2011-05-02 00:00:00.000 2 0
*/
(
Id int primary key identity(1,1),
Dates date not null,
fs char(2) not null,
)
insert into FS values('2011-05-01','胜')
insert into FS values('2011-05-02','胜')
insert into FS values('2011-05-01','负')
insert into FS values('2011-05-02','胜')
insert into FS values('2011-05-01','负')
select dates,FS,COUNT(fs) counts from FS group by Dates,fs
/*
dates FS counts
2011-05-01 负 2
2011-05-01 胜 1
2011-05-02 胜 2
*/