mysql 创办自增长订单号
mysql 创建自增长订单号 因为最近做项目需要,需要使用到,自定义的不重复的自增长的订单号,在网上找了资料然后又加入了自己的修改,做成的mysql生成订单号的存储过程。 drop PROCEDURE pp; create procedure PROC_GET_NO (tname varchar(50),cname VARCHAR(
mysql 创建自增长订单号因为最近做项目需要,需要使用到,自定义的不重复的自增长的订单号,在网上找了资料然后又加入了自己的修改,做成的mysql生成订单号的存储过程。
drop PROCEDURE pp;
create procedure PROC_GET_NO (tname varchar(50),cname VARCHAR(50),prefix VARCHAR(20))
begin
#最终生成的订单号
declare order_sn VARCHAR(20);
#当前系统中的订单号
declare prev VARCHAR(15);
#旧的日期
declare prevdatetime VARCHAR(15);
#截取到的编号
declare sn BIGINT(15);
#当前的系统时间
declare nowdate VARCHAR(15);
# 获得当天的最后一条记录编号 判断数据库中的创建日期是否大于当前日期 也就等于是是否是当天的单据
set @pre = prefix;
set @na=tname;
set @cna = cname;
set @sql_text:='select MAX(';
set @sql_text := CONCAT(@sql_text,@cna,') into @recordcount from ');
set @whe :=' WHERE create_date > CURRENT_DATE()';
set @sql_text:=concat(@sql_text,@na,@whe);
prepare stmt from @sql_text;
execute stmt;
set prev = @recordcount;
#截取日期
select SUBSTR(prev FROM 2 FOR 9) into prevdatetime;
#截取编号
select RIGHT(prev,5) into sn;
#获得当前的时间 使用now()函数 获得的格式是2014-05-28 11:20:18 然后在获取自己想要的数据
select DATE_FORMAT(NOW(),'%Y%m%d') into nowdate;
#判断最后一条记录是否为空
if isnull(prev) then
select concat(@pre,nowdate,'00001') into order_sn;
#return order_sn;
elseif nowdate = prevdatetime then
select concat(@pre,nowdate,'00001') into order_sn;
#return order_sn;
else
select concat(@pre,prevdatetime,LPAD((sn+1),4,'0'))into order_sn;
#return order_sn;
end if;
select order_sn;
end;
CALL pp('quotation','quotation_no','O')

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