我有以下情况:有1个带书籍的表和两对表(HD / IT),其中销售订单和采购订单交易通过销售订单ID连接。 表格结构如下:
CREATE TABLE `books` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`isbn` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
`it_id` int(11) NOT NULL,
`kind` tinyint(4) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `books` (`id`, `isbn`, `it_id`, `kind`) VALUES
(1, '12345', 1, 1),
(2, '12345', 1, 2),
(3, '67890', 2, 1),
(4, '1111111', 2, 2);
CREATE TABLE `porders_hd` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`dt` date NOT NULL,
`so_id` int(11) DEFAULT NULL,
`customer` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `porders_hd` (`id`, `dt`, `so_id`, `customer`) VALUES
(1, '2017-07-02', 1, 1),
(2, '2017-08-03', NULL, 3);
CREATE TABLE `porders_it` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`hd_id` int(11) NOT NULL,
`isbn` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
`dscr` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
`qty` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `porders_it` (`id`, `hd_id`, `isbn`, `dscr`, `qty`) VALUES
(1, 1, '12345', 'Book 1', 1),
(2, 2, '1111111', 'Book 2', 1);
CREATE TABLE `sorders_hd` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`dt` date NOT NULL,
`customer` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `sorders_hd` (`id`, `dt`, `customer`) VALUES
(1, '2017-07-01', 1),
(2, '2017-08-01', 2);
CREATE TABLE `sorders_it` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`hd_id` int(11) NOT NULL,
`isbn` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
`dscr` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
`qty` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `sorders_it` (`id`, `hd_id`, `isbn`, `dscr`, `qty`) VALUES
(1, 1, '12345', 'Book 1', 1),
(2, 2, '67890', 'Book 2', 1);
总结如下: * 1采购订单中存在的销售订单(#1)(#1) * 1销售订单(#2)仍在等待中 * 1没有销售订单创建的采购订单(#2)
我希望能够获取每本书的所有销售和采购订单的isbn,并且连接的SO和PO必须在同一行。输出必须如下所示:
so_id so_date po_id po_date isbn dscr
NULL NULL 2 2017-08-03 1111111 Book 2
1 2017-07-01 1 2017-07-02 12345 Book 1
2 2017-08-01 NULL NULL 67890 Book 3
我尝试使用如下所示的查询抓取行:
SELECT
GROUP_CONCAT(so_id) so_id,
GROUP_CONCAT(so_date) so_date,
GROUP_CONCAT(po_id) po_id,
GROUP_CONCAT(po_date) po_date,
isbn,
dscr
FROM (
SELECT
hd.so_id so_id,
NULL so_date,
hd.id po_id,
hd.dt po_date,
bk.isbn,
it.dscr
FROM porders_hd hd,
porders_it it,
books bk
WHERE it.hd_id = hd.id
AND bk.isbn = it.isbn
AND kind = 2
UNION
SELECT
hd.id so_id,
hd.dt so_date,
NULL po_id,
NULL po_date,
bk.isbn,
it.dscr
FROM sorders_hd hd,
sorders_it it,
books bk
WHERE it.hd_id = hd.id
AND bk.isbn = it.isbn
AND kind = 1
) as table1
GROUP BY isbn, so_id, po_id
但由于缺少信息,我得到以下结果:
so_id so_date po_id po_date isbn dscr
NULL NULL 2 2017-08-03 1111111 Book 2
1 2017-07-01 NULL NULL 12345 Book 1
1 NULL 1 2017-07-02 12345 Book 1
2 2017-08-01 NULL NULL 67890 Book 3
任何想法我怎样才能做到这一点?
答案 0 :(得分:0)
我认为这就是你所追求的,但我可以从你的代码中找出My.Computer.Registry.GetValue("registry key here", "Key to delete", Nothing) Is Nothing
的作用。但是这里有一个查询,对于每本书,获取相关的po行项目,找到相应的so行项目并加入标题行,以便日期可用。请注意我的假设,即销售订单不能与相应的采购订单一起存在。
kind
您可以规范化表格,以便不需要重复descr,也可以使用其他表格中的book.id而不是isbn。
答案 1 :(得分:0)
我添加了一个新的答案,因为前一个和评论是说明性的。基于该讨论,这需要一个FULL OUTER JOIN,它必须由mysql中的UNION ALL模拟(这可能是OP最初尝试的)。
这是我的新代码,考虑到这一点:
SELECT sorders_hd.id as so_id, sorders_hd.dt as so_dt,
porders_hd.id as po_id, porders_hd.dt as po_dt,
books.isbn, porders_it.dscr
from books
left outer join porders_it on porders_it.isbn=books.isbn
join porders_hd on porders_hd.id=porders_it.hd_id
left outer join sorders_it on sorders_it.isbn=books.isbn and sorders_it.hd_id=porders_hd.so_id
left outer join sorders_hd on sorders_hd.id=sorders_it.hd_id
where books.kind=2
UNION ALL
SELECT sorders_hd.id as so_id, sorders_hd.dt as so_dt,
porders_hd.id as po_id, porders_hd.dt as po_dt,
books.isbn, sorders_it.dscr
from books
left outer join sorders_it on sorders_it.isbn=books.isbn
join sorders_hd on sorders_hd.id=sorders_it.hd_id
left outer join porders_it on porders_it.isbn=books.isbn
left outer join porders_hd on porders_hd.id=porders_it.hd_id and porders_hd.so_id=sorders_hd.id
where porders_hd.id is null and books.kind=1;
输出结果为:
so_id so_dt po_id po_dt isbn dscr
1 2017-07-01 1 2017-07-02 12345 Book 1
(null) (null) 2 2017-08-03 1111111 Book 2
2 2017-08-01 (null) (null) 67890 Book 2
请参阅SqlFiddle
"技巧"是使用union all和两个查询之一,不包括链接双方的记录(以获得FULL OUTER JOIN的'右侧)
+1到OP用于提供DDL和样本数据!
我同意数据模型可以重做,并且可以标准化。当销售订单和采购订单匹配时(其中一个被忽略),现有模型仍至少存在重复账簿记录的问题。在我看来,一个改进是拥有一个主书籍清单,并在porders_it和sorders_it中包含该表的id(或isbn,如果这是主键),并删除当前的书籍表。