sql存储过程实例--动态根据表数据复制一个表的数据到另一个表

-- 创建一个 名为sub_track的存储过程CREATE PROCEDURE sub_track()begin  declare i int;  -- 定义 循环变量i  set @imei =0;  -- 定义imei最后两位  set @t_count=0; -- 定义 表有多少条记录变量  SET i=0;  SELECT COUNT(*)INTO @t_count FROM track;        -- 获取表的条数while i <= @t_count do                   -- 循环 SELECT RIGHT(mac_id,2) INTO @imei FROM track ORDER BY gpstime DESC LIMIT i, 1;  -- 获取 imei 最后两位   set @imei =CONVERT(@imei,SIGNED);                       -- 转为数字  -- SQL 语句  set @sql1=" (               mac_id,mac_type,channel,type,x,y,gpstime,bvalid,speed,dir,s1,s2,s3,s4,ins_date,imagefile,battery             )             SELECT                mac_id,mac_type,channel,type,x,y,gpstime,bvalid,speed,dir,s1,s2,s3,s4,ins_date,imagefile,battery            FROM track             ORDER BY              gpstime DESC            LIMIT ";  set @inset_sql=CONCAT("INSERT INTO track_",@imei,@sql1,i,",",1);    -- 拼接完整的插入 sql语句  PREPARE insert_track from @inset_sql;                  -- 预编译  EXECUTE insert_track;                          -- 执行sql语句  set i=i+1;-- 结束循环end while;  commit;end-- 执行存储过程CALL sub_track();@flm