sql 游标实例

--声明一个游标
DECLARE MyCursor CURSOR
FOR SELECT TOP 5 FBookName,FBookCoding FROM TBookInfo//定义一个叫MyCursor的游标，存放for select 后的数据
--打开一个游标
OPEN MyCursor//即打开这个数据集
--循环一个游标
DECLARE @BookName nvarchar(2000),@BookCoding nvarchar(2000)
FETCH NEXT FROM MyCursor INTO @BookName,@BookCoding//移动游标指向到第一条数据，提取第一条数据存放在变量中
WHILE @@FETCH_STATUS =0//若是上一次操做成功则继续循环
BEGIN
print 'name'+@BookName
FETCH NEXT FROM MyCursor INTO @BookName,@BookCoding//继续提下一行
END
--关闭游标
CLOSE MyCursor
--释放资源
DEALLOCATE MyCursor

例子

create table #a   
(   
id varchar(20),   
name varchar(20) 
)    
insert into #a select 1,'jack'   
insert into #a select 2,'join'   
insert into #a select 3,'make' 
declare mycursor cursor    
for select * from #a 
open mycursor    
declare @id varchar(20),@name varchar(20)   
fetch next from mycursor into @id,@name 
while @@fetch_status=0 
begin   
select @id,@name   
fetch next from mycursor into @id,@name   
end    
close mycursor   
deallocate mycursor

转载于:https://blog.51cto.com/congwa/1302345