首先建立要操作的表
CREATE TABLE `jackpot_info` (
`issuenumber` varchar(32) DEFAULT NULL COMMENT '期号',
`lotterytype` varchar(30) DEFAULT NULL COMMENT '彩票类型',
`moneypool` varchar(50) DEFAULT NULL COMMENT '奖池',
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
业务需要实现查询每个彩票类型的最大期号的奖池
查询语句如下
select p.* from
jackpot_info p,
(select max(issuenumber) as issuenumber,lotterytype as lotterytype from jackpot_info group by lotterytype) m
where p.issuenumber=m.issuenumber and p.lotterytype=m.lotterytype