sqlserver存储过程while sqlserver存储过程for循环

SQLserver中存储过程中如何循环取值

sqlserver 中循环取值有两种方法:

1.使用游标

2.mssql sqlserver 遍历循环的新方法-使用while语句+临时表的方法。

相关问答

Q1: SqlServer存储过程

create procedure prCreateSubPlan

as

begin

declare @id int,

@intCycle int,

@planName varchar(100),

@createTime smalldatetime,

@cycleTime int

select @id = min(t_cplan_id) from t_cplan

while (@id is not null)

begin

select @planName=t_plan_name, @createTime = createTime, @cycleTime = cycleTime from t_cplan where t_cplan_id=@id

select @intCycle= 0

while (@intCycle@cycleTime)

begin

-- 表t_plan 列t_plan_id是IDENTITY 列

insert t_plan (t_plan_name, t_cplan_id, createTime)

values (@planName, @id, dateadd(day, @intCycle, @createTime))

select @intCycle = @intCycle + 1

end

select @id = min(t_cplan_id) from t_cplan where t_cplan_id@id

end

end

go

Q2: sqlserver存储过程何循环读表。

使用游标，如下

CREATE PROCEDURE proc_getalltable

AS

BEGIN

SET NOCOUNT ON;

DECLARE @tablename VARCHAR(100),@sql VARCHAR(1000)

DECLARE tablename CURSOR FOR SELECT tname FROM tablelist

OPEN tablename

FETCH NEXT FROM tablename INTO @tablename

WHILE @@FETCH_STATUS = 0

BEGIN

SELECT @sql = 'SELECT * FROM ' + @tablename

EXEC(@sql)

FETCH NEXT FROM tablename INTO @tablename

END

CLOSE tablename

DEALLOCATE tablename

END

GO

Q3: Sqlserver存储过程如何写循环

declare @i int

set @i = 0

while @i 100

begin

print @i

set @i = @i + 1

end

-- 定义循环变量

declare @loopIndex int set @loopIndex = 0

--定义循环次数

declare @count int set @count=1

-- 取得循环次数

select @count=count(1) from sys_user

-- 开始循环

while @loopIndex = @count

begin

  -- 定义接收参数

  declare @USER_NAME nvarchar(50)

-- 取得循环的数据

SELECT @USER_NAME = hh.USER_NAME

FROM (SELECT ROW_NUMBER() OVER (ORDER BY USER_NAME) 'rowindex',USER_NAME FROM sys_user)hh 

WHERE hh.rowindex = @loopIndex

-- 进行相关业务逻辑 例如输出结果 

print @USER_NAME

-- 循环自动加一

set @loopIndex = @loopIndex + 1

end

begin

  -- 定义错误返回信息

  declare @error int 

-- 定义接收参数

  declare @User_Name varchar(50)

  declare @Address varchar(50)

  set @error=0

  --定义游标

  declare demo_cursor cursor

  for (select User_Name,Address from sys_user)

  --打开游标--

  open demo_cursor

  --开始循环游标变量--

  fetch next from demo_cursor into @User_Name,@Address

  while @@FETCH_STATUS = 0  --返回被 FETCH语句执行的最后游标的状态--

    begin       

      print @User_Name+'____'+@Address

      set @error= @error + @@ERROR  --记录每次运行sql后是否正确，0正确

      fetch next from demo_cursor into @User_Name,@Address  --转到下一个游标，没有会死循环

    end  

  close demo_cursor --关闭游标

  deallocate demo_cursor  --释放游标

end

更多内容请访问：

Q4: sqlserver 存储过程中循环遍历结果集

sql1=select * from (select *, row_number() over(order by username ) as rowNumber from users where regfrom='admin') as t where t.rowNumber 0 and t.rowNumber = 0 + 30 order by username

怎么会有27 条记录呢，除非你的表 一共就27条记录吧。

用游标或临时表

--游标

declare youbiao1 for 查询1

open youbiao1

fetch next from youbiao1 into 变量

while @@FETCH_STATUS = 0

begin

里面一次套用

end

--临时表

declare @ID int

set @ID = 1

while Exists(select * from 表)

begin

--处理

--

set @ID = @ID + 1

end

sqlserver存储过程while的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于sqlserver存储过程for循环、sqlserver存储过程while的信息别忘了在本站进行查找喔。