Sql代码 
- select concat('OD',date_format(now(),'%Y%m%d'),LPAD(NEXTVAL(date_format(now(),'%Y%m%d')),4,'0'));
- select length('OD201504040000');
- select LOCATE('e','eqwe,rqwe');
- select left('eqwe,rqwe',2);
- select right('left,right',2);
- select length('left,right');
- select right('left,right',length('left,right')-LOCATE(',','left,right')) ;
Sql代码
- set @v_det= '7,2';-- old.v_det; -- 7,2,7,2 [{"GID":"7","NUM":"2"},{"GID":"7","NUM":"2"}]
- WHILE (LOCATE(',', @v_det)>0) do
- set @v_gid = left( @v_det,LOCATE(',', @v_det )); -- 明细商品id
- set @temp = right( @v_det,(length(@v_det)-LOCATE(',' , @v_det))); -- select right('left,right',length('left,right')-LOCATE(',','left,right')) ;
- set @v_count = left( @temp,LOCATE(',', @temp)); -- 明细数量
- set @v_det = right( @temp,(length(@temp)-LOCATE(',' , @temp)));
- -- set @v_sql = concat('insert into t_order_item2(qd_id,com_id,snum) values (,', @v_gid,''',''', @v_count,'''');
- set @v_sql = concat(@v_gid );
- insert into t_order_item2 (com_id) values(@v_sql);
- -- prepare stmt from @v_sql; -- 预处理需要执行的动态SQL，其中stmt是一个变量
- -- EXECUTE stmt; -- 执行SQL语句
- -- deallocate prepare stmt; -- 释放掉预处理段
- END WHILE;