SQL查询遍历数据方法一 [ 临时表 + While循环]

以下以SQL Server 2000中的NorthWind数据库中的Customers表为例,

用 临时表 + While循环 的方法, 对Customers表中的CompanyName列进行遍历

create table #temp
(
  id int identity(1,1),
  customer nvarchar(50)
)

declare @customer nvarchar(50)
declare @n        int
declare @rows     int

select @n=1

insert #temp(customer) select distinct companyname from customers

select @rows = @@rowcount

while @n <= @rows
begin

select @customer = companyname
from customers
     where companyname=(select customer from #temp where id = @n)
order by companyname desc

print(@customer)

select @n = @n + 1

end

运行后, 输出结果如下:

（所影响的行数为 91 行）

Alfreds Futterkiste
Ana Trujillo Emparedados y helados
Antonio Moreno Taquería
Around the Horn
Berglunds snabbköp
Blauer See Delikatessen
Blondesddsl père et fils
Bólido Comidas preparadas
Bon app'
Bottom-Dollar Markets
B's Beverages
Cactus Comidas para llevar
Centro comercial Moctezuma
Chop-suey Chinese
Comércio Mineiro
Consolidated Holdings
Die Wandernde Kuh
Drachenblut Delikatessen
Du monde entier
Eastern Connection
Ernst Handel
Familia Arquibaldo
FISSA Fabrica Inter. Salchichas S.A.
Folies gourmandes
Folk och fä HB
France restauration
Franchi S.p.A.
Frankenversand
Furia Bacalhau e Frutos do Mar
Galería del gastrónomo
Godos Cocina Típica
Gourmet Lanchonetes
Great Lakes Food Market
GROSELLA-Restaurante
...... (以下略) ..................................