查询单个时间点SQL如下:
select sum(t.qty - IFNULL((select sum(if(sois.qty_ship is null,0,sois.qty_ship)) as ship from sos left join sois on sos.sn = sois.sn where t.so = sos.so and (t.si = sois.si or t.si = substring(sois.si,1,locate('_',sois.si) -1)) and sois.date_shipped < '2012-12-01 00:00:00'),0)) as unship from so as temp left join soi as t on temp.so = t.so where temp.reviewed < '2012-12-01 00:00:00' and t.delivery < '2012-12-01 00:00:00' and temp.id in ('W010') and (t.status = 'OPEN' or t.status = 'CLOSED');这是查询截止到一个时间点的累计数量语句,如果要查询从2012-01-01到2012-12-31之间,每个月底的累计数量,那应该怎么查询?table创建语句如下:
CREATE TABLE `sos` (
`sn` varchar(10) NOT NULL default '',
`so` varchar(10) NOT NULL default '',
`id` varchar(10) NOT NULL default '',
`status` varchar(30) NOT NULL default '',
PRIMARY KEY (`sn`),
KEY `so` (`so`,`sn`),
KEY `id` (`id`),
KEY `status` (`status`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;CREATE TABLE `sois` (
`so` varchar(10) NOT NULL default '',
`si` varchar(10) NOT NULL default '',
`sn` varchar(10) NOT NULL default '',
`date_shipped` datetime default NULL,
`pn` varchar(50) NOT NULL default '',
`pa` varchar(50) NOT NULL default 'P/A',
`qty` decimal(20,4) NOT NULL default '0.0000',
`qty_ship` decimal(20,4) NOT NULL default '0.0000',
PRIMARY KEY (`sn`,`si`),
KEY `so` (`so`,`si`,`sn`),
KEY `status` (`status`),
KEY `pn` (`pn`,`pa`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;CREATE TABLE `so` (
`so` varchar(10) NOT NULL default '',
`id` varchar(10) NOT NULL default '',
`status` varchar(255) NOT NULL default 'NOT REVIEWED',
`reviewed` timestamp NOT NULL default '0000-00-00 00:00:00',
PRIMARY KEY (`so`),
KEY `id` (`id`),
KEY `status` (`status`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `soi` (
`so` varchar(10) NOT NULL default '',
`si` varchar(10) NOT NULL default '',
`status` varchar(255) NOT NULL default 'OPEN',
`delivery` date NOT NULL default '0000-00-00',
`pn` varchar(50) NOT NULL default '',
`pa` varchar(50) NOT NULL default 'P/A',
`qty` decimal(20,4) NOT NULL default '0.0000',
PRIMARY KEY (`so`,`si`),
KEY `pn` (`pn`),
KEY `status` (`status`),
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
select sum(t.qty - IFNULL((select sum(if(sois.qty_ship is null,0,sois.qty_ship)) as ship from sos left join sois on sos.sn = sois.sn where t.so = sos.so and (t.si = sois.si or t.si = substring(sois.si,1,locate('_',sois.si) -1)) and sois.date_shipped < '2012-12-01 00:00:00'),0)) as unship from so as temp left join soi as t on temp.so = t.so where temp.reviewed < '2012-12-01 00:00:00' and t.delivery < '2012-12-01 00:00:00' and temp.id in ('W010') and (t.status = 'OPEN' or t.status = 'CLOSED');这是查询截止到一个时间点的累计数量语句,如果要查询从2012-01-01到2012-12-31之间,每个月底的累计数量,那应该怎么查询?table创建语句如下:
CREATE TABLE `sos` (
`sn` varchar(10) NOT NULL default '',
`so` varchar(10) NOT NULL default '',
`id` varchar(10) NOT NULL default '',
`status` varchar(30) NOT NULL default '',
PRIMARY KEY (`sn`),
KEY `so` (`so`,`sn`),
KEY `id` (`id`),
KEY `status` (`status`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;CREATE TABLE `sois` (
`so` varchar(10) NOT NULL default '',
`si` varchar(10) NOT NULL default '',
`sn` varchar(10) NOT NULL default '',
`date_shipped` datetime default NULL,
`pn` varchar(50) NOT NULL default '',
`pa` varchar(50) NOT NULL default 'P/A',
`qty` decimal(20,4) NOT NULL default '0.0000',
`qty_ship` decimal(20,4) NOT NULL default '0.0000',
PRIMARY KEY (`sn`,`si`),
KEY `so` (`so`,`si`,`sn`),
KEY `status` (`status`),
KEY `pn` (`pn`,`pa`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;CREATE TABLE `so` (
`so` varchar(10) NOT NULL default '',
`id` varchar(10) NOT NULL default '',
`status` varchar(255) NOT NULL default 'NOT REVIEWED',
`reviewed` timestamp NOT NULL default '0000-00-00 00:00:00',
PRIMARY KEY (`so`),
KEY `id` (`id`),
KEY `status` (`status`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `soi` (
`so` varchar(10) NOT NULL default '',
`si` varchar(10) NOT NULL default '',
`status` varchar(255) NOT NULL default 'OPEN',
`delivery` date NOT NULL default '0000-00-00',
`pn` varchar(50) NOT NULL default '',
`pa` varchar(50) NOT NULL default 'P/A',
`qty` decimal(20,4) NOT NULL default '0.0000',
PRIMARY KEY (`so`,`si`),
KEY `pn` (`pn`),
KEY `status` (`status`),
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
解决方案 »
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from(你写的语句)
group by concat(year(delivery),'-',month(delivery)
参考一下这个贴子的提问方式http://topic.csdn.net/u/20091130/20/8343ee6a-417c-4c2d-9415-fa46604a00cf.html
1. 你的 create table xxx .. 语句
2. 你的 insert into xxx ... 语句
3. 结果是什么样,(并给以简单的算法描述)
4. 你用的数据库名称和版本(经常有人在MS SQL server版问 MySQL)
这样想帮你的人可以直接搭建和你相同的环境,并在给出方案前进行测试,避免文字描述理解上的误差。