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
*/