SQL Server 游標(biāo)語(yǔ)句 聲明/打開(kāi)/循環(huán)實(shí)例

--聲明一個(gè)游標(biāo)
DECLARE MyCursor CURSOR
FOR SELECT TOP 5 FBookName,FBookCoding FROM TBookInfo//定義一個(gè)叫MyCursor的游標(biāo)，存放for select 后的數(shù)據(jù)

--打開(kāi)一個(gè)游標(biāo)
OPEN MyCursor//即打開(kāi)這個(gè)數(shù)據(jù)集

--循環(huán)一個(gè)游標(biāo)
DECLARE @BookName nvarchar(2000),@BookCoding nvarchar(2000)
FETCH NEXT FROM MyCursor INTO @BookName,@BookCoding//移動(dòng)游標(biāo)指向到第一條數(shù)據(jù)，提取第一條數(shù)據(jù)存放在變量中
WHILE @@FETCH_STATUS =0//如果上一次操作成功則繼續(xù)循環(huán)
BEGIN
print 'name'+@BookName
FETCH NEXT FROM MyCursor INTO @BookName,@BookCoding//繼續(xù)提下一行
END

--關(guān)閉游標(biāo)
CLOSE MyCursor
--釋放資源
DEALLOCATE MyCursor

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