sql server 游标的简单用法

sql server游标：

--定义游标

declare cursor1 cursor for select ID,Name from A

--打开游标

open cursor1

declare @id int

declare @name varchar(50)

declare @n int

declare @i int=1

set @n=(select COUNT(1) from A)

while(@i<@n)

begin

set @i=@i+1

fetch next from cursor1 into @id,@name

select @id select @name

end

--关闭游标

close cursor1

--释放游标，释放后就不能在打开游标了

deallocate cursor1