mysql 存储过程实例 (日期以小时递增 while loop循环嵌套 随机数生成)
直接上代码：[DELIMITER $$
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drop procedure if exists proc_test$$
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create procedure proc_test()
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begin
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declare id int; --对象id
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declare done int; --循环结束的标志
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declare in_dateTime date; --循环递增的起始时间
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declare tempVal int; --随机数
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declare cursor_test cursor for select cfldID from cfield; --建立游标，获取所有的cfield的id
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DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1; --设置循环结束的标志
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open cursor_test; --打开游标
[*] cursor_loop:loop
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fetch cursor_test into id;
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if done =1 then
[*] leave cursor_loop;
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end if;
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--设置起始时间值
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set in_dateTime = '2012-11-30 00:00:00';
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set @in_dateTime = in_dateTime;
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--while递增循环，每次增加一个小时
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loop_while: while @in_dateTime < '2012-11-30 23:00:00' do
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--生成随机数
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SELECT FLOOR(18 + (RAND() * 7)) into tempVal;
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set @tempVal = tempVal;
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insert into cdacq(cfldID,HTime,MTime,LTime,FanState,FanPowerState,SupplyTemp,RoomTemp,AcqTime,Alt) values(id,10000,10000,10000,'84','0',42,@tempVal,@in_dateTime,'');
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set @in_dateTime = date_add(@in_dateTime, interval '01:00:00' hour_second); --时间增加一小时
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end while loop_while; --结束while循环
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end loop cursor_loop; --结束loop循环
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close cursor_test; --关闭游标
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end $$ --存储过程结束
[*]DELIMITER;
DELIMITER $$
drop procedure if exists proc_test$$
create procedure proc_test()
begin
declare id int;--对象id
declare done int; --循环结束的标志
declare in_dateTime date; --循环递增的起始时间
declare tempVal int; --随机数
declarecursor_test cursor for select cfldID from cfield; --建立游标，获取所有的cfield的id
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1; --设置循环结束的标志
open cursor_test; --打开游标
cursor_loop:loop
fetch cursor_test into id;
if done =1 then
leave cursor_loop;
end if;
--设置起始时间值
set in_dateTime = '2012-11-30 00:00:00';
set @in_dateTime = in_dateTime;
--while递增循环，每次增加一个小时
loop_while: while @in_dateTime < '2012-11-30 23:00:00' do
--生成随机数
SELECT FLOOR(18 + (RAND() * 7)) into tempVal;
set @tempVal = tempVal;
insert into cdacq(cfldID,HTime,MTime,LTime,FanState,FanPowerState,SupplyTemp,RoomTemp,AcqTime,Alt) values(id,10000,10000,10000,'84','0',42,@tempVal,@in_dateTime,'');
set @in_dateTime = date_add(@in_dateTime, interval '01:00:00' hour_second); --时间增加一小时
end while loop_while; --结束while循环
end loop cursor_loop;--结束loop循环
close cursor_test; --关闭游标
end$$ --存储过程结束
DELIMITER;
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