sql Test

IF NOT OBJECT_ID('[t_Brand]') IS NULL    

DROP TABLE [t_Brand]

GO

CREATE 

TABLE [t_Brand]

(

[ID] int identity(1,1) primary key not null,

[brandName] Nvarchar(20) null

)

go

IF NOT OBJECT_ID('[t_Product]') IS NULL    

DROP TABLE [t_Product]

GO

CREATE TABLE [t_Product]

(

[ID] int identity(1,1) primary key not null,

[ProductName] Nvarchar(20) null

)

go

INSERT [t_Brand]

SELECT '喜来登珠宝 ' 

union all SELECT '香菲草  ' 

union all SELECT '夏普' 

union all SELECT '仙蒂罗娜' 

union all SELECT '小鸡卡迪' 

union all SELECT '小龙哈彼' 

go

insert into [t_Product]

SELECT '喜来登珠宝 ' 

union all SELECT '香菲草  ' 

union all SELECT '夏普' 

union all SELECT '仙蒂罗娜' 

union all SELECT '小鸡卡迪' 

union all SELECT '小龙哈彼'

union all SELECT '香菲草  '

union all SELECT '夏普' 

union all SELECT '仙蒂罗娜' 

union all SELECT '小鸡卡迪'

union all SELECT '小龙哈彼'

union all SELECT '小龙哈彼' 

union all SELECT '香菲草  ' 

union all SELECT '仙蒂罗娜' 

union all SELECT '小鸡卡迪' 

union all SELECT '小龙哈彼' 

union all SELECT '香菲草  ' 

union all SELECT '夏普' 

union all SELECT '夏普' 

go

select a.brandName as 品牌数,

(

select count(1)  from t_product  t where t. productname=a.brandname) 产品数 

from T_brand aorder by 产品数 desc

go

/*品牌数    产品数

  香菲草      4

  夏普        4

  小龙哈彼    4

  仙蒂罗娜    3

  小鸡卡迪    3

  喜来登珠宝  1

*/