我有2个SQL查询共享一个名为catalogid
查询＃1：
Select
catalogid, numitems, allitems - numitems ignoreditems
from
(select
i.catalogid,
sum(case when (ocardtype in ('PayPal','Sofort') OR
ocardtype in ('mastercard','visa') and
odate is not null) then numitems
else 0 end) numitems,
sum(numitems) allitems
from orders o"
join oitems i on i.orderid=o.orderid"
join products T1 on T1.catalogid = i.catalogid"
group by i.catalogid) X
查询＃2：
SELECT catalogId, ProcessedSucssessfully =
STUFF((SELECT ', ' + CAST( b.orderid as varchar(10))
FROM oitems b JOIN orders o ON b.orderid = o.orderid
WHERE b.catalogId = a.catalogId
AND (o.ocardtype in ('PayPal','Sofort') OR o.ocardtype in ('mastercard','visa') and o.odate is not null)
FOR XML PATH('')), 1, 2, ''),
NotProcessed =
STUFF((SELECT ', ' + CAST( c.orderid as varchar(10))
FROM oitems c JOIN orders o ON c.orderId = o.orderid
WHERE c.catalogid = a.catalogid
AND (o.ocardtype in ('mastercard') OR o.ocardtype is null) and o.odate is null
FOR XML PATH('')), 1, 2, '')
FROM oitems a
GROUP BY a.CatalogId
您如何将这些2组合成一个查询或加入它们？
注意我将这些2作为SqlCommand从vb.net运行
有一点需要注意的是，我对两个查询都有相同的条件，我尝试做的是将第二个查询部分添加到无法解决的选择案例中
以下是涉及的表格
oitems表
+---------+-----------+----------+
| orderid | catalogid | numitems |
+---------+-----------+----------+
| o737 | 353 | 1 |
| o738 | 364 | 4 |
| o739 | 353 | 3 |
| o740 | 364 | 6 |
| o741 | 882 | 2 |
| o742 | 224 | 5 |
| o743 | 224 | 2 |
+---------+-----------+----------+
订单表
+-----------------+------------+------------+
| orderid | ocardtype | odate |
+-----------------+------------+------------+
| o737 | Paypal | | 'OK
| o738 | MasterCard | 01.02.2012 | 'OK
| o739 | MasterCard | 02.02.2012 | 'OK
| o740 | Visa | 03.02.2012 | 'OK
| o741 | Sofort | | 'OK
| o742 | | | 'ignore because ocardtype is empty
| o743 | MasterCard | | 'ignore because Mastercard no odate
+-----------------+------------+------------+
查询＃1的结果：
+-----------+----------+--------------+
| catalogid | numitems | ignoreditems |
+-----------+----------+--------------+
| 353 | 4 | 0 |
| 364 | 10 | 0 |
| 882 | 2 | 0 |
| 224 | 0 | 7 |
+-----------+----------+--------------+
查询＃2的结果：
+-----------+------------------------+--------------+
| catalogid | ProcessedSucssessfully | NotProcessed |
+-----------+------------------------+--------------+
| 353 |o737,o739 | |
| 364 |o738,o740 | |
| 882 |o741 | |
| 224 | |o742,o743 |
+-----------+------------------------+--------------+
想要的结果：
+-----------+-----------+--------------+-------------------------+---------------+
| catalogid | numitems | ignoreditems | ProcessedSucssessfully | NotProcessed |
+-----------+-----------+--------------+-------------------------+---------------+
| 353 | 4 | 0 | o737,o739 | |
| 364 | 10 | 0 | o738,o740 | |
| 882 | 2 | 0 | o741 | |
| 224 | 0 | 7 | | o742,o743 |
+-----------+-----------+--------------+-------------------------+---------------+
Query1的条件：
如果ocardtype为空，则忽略numitems并将其视为总和中的0，并将忽略的项目汇总到ignoreditems列
如果某个订单的ocardtype是MasterCard或Visa并且odate为空，则忽略numitems并将其视为0并将忽略的项目汇总到ignoreditems列
如果ocardtype是Paypal或Sofort，那么只需执行numitems总和而不检查日期，因为这些类型不需要odate
Query2的条件与Query1相同但不同的事情要做：
如果ocardtype为空，则将orderid添加到NotProcessed
如果某个订单的ocardtype是万事达卡或维萨而且odate为空，则将orderid添加到NotProcessed
如果ocardtype为Paypal或Sofort，则不要检查odate并将orderid添加到ProcessedSucssessfully
上面的内容是在2个单独的查询中完成的，但是我试图将它放入一个查询中，因为它们具有相同的条件
答案 0 :(得分：2)
您可以在sql框中创建一个视图，然后只需要Linq到该视图
select * from table_a inner join table_b on table_a.field_a = table_b.field_b
编辑：
或
Select * from (select * from table_a inner join table_b on table_a.field_a = table_b.field_b) AB
inner join
select * from (select * from table_c inner join table_d on table_c.field_c = table_d.field_d) CD
ON
AB.id_column = CD.id_column
答案 1 :(得分：1)
SQL Server视图看起来像这样
SELECT * FROM
(
Select
catalogid, numitems, allitems - numitems ignoreditems
from
(
select * from
(
select
i.catalogid,
sum(case when (ocardtype in ('PayPal','Sofort')
OR
ocardtype in ('mastercard','visa') and odate is not null) then numitems
else 0 end) numitems,
sum(numitems) allitems
from
orders
) o
inner join
items i
on
i.orderid=o.orderid
inner join
products T1
on
T1.catalogid = i.catalogid
group by
i.catalogid
) A
) X
) B
INNER JOIN
SELECT * FROM
(
SELECT
catalogId,
ProcessedSucssessfully =
STUFF((SELECT ', ' + CAST( b.orderid as varchar(10))
FROM oitems b JOIN orders o ON b.orderid = o.orderid
WHERE b.catalogId = a.catalogId
AND (o.ocardtype in ('PayPal','Sofort') OR o.ocardtype in ('mastercard','visa') and o.odate is not null)
FOR XML PATH('')), 1, 2, ''),
NotProcessed =
STUFF((SELECT ', ' + CAST( c.orderid as varchar(10))
FROM oitems c JOIN orders o ON c.orderId = o.orderid
WHERE c.catalogid = a.catalogid
AND (o.ocardtype in ('mastercard') OR o.ocardtype is null) and o.odate is null
FOR XML PATH('')), 1, 2, '')
FROM
oitems a
GROUP BY
a.CatalogId
) B
ON A.CatalogId = B.CatalogId
答案 2 :(得分：1)
好的，我们去了，我构建了表结构来验证SQL。 我没有加载任何数据，但确实执行了。
SELECT * FROM
(
Select
catalogid, numitems, allitems - numitems ignoreditems
from
(
select
i.catalogid,
case
when ocardtype in ('PayPal','Sofort') then sum(i.numitems)
when ocardtype in ('mastercard','visa') and odate is not null then sum(i.numitems)
else 0 end numitems,
sum(numitems) allitems
from
orders o
inner join
oitems i
on
i.orderid=o.orderid
inner join
products T1
on
T1.catalogid = i.catalogid
group by
i.catalogid, ocardtype, odate
) A
) B
INNER JOIN
(
SELECT
catalogId,
ProcessedSucssessfully =
STUFF((SELECT ', ' + CAST( b.orderid as varchar(10))
FROM oitems b JOIN orders o ON b.orderid = o.orderid
WHERE b.catalogId = a.catalogId
AND (o.ocardtype in ('PayPal','Sofort') OR o.ocardtype in ('mastercard','visa') and o.odate is not null)
FOR XML PATH('')), 1, 2, ''),
NotProcessed =
STUFF((SELECT ', ' + CAST( c.orderid as varchar(10))
FROM oitems c JOIN orders o ON c.orderId = o.orderid
WHERE c.catalogid = a.catalogid
AND (o.ocardtype in ('mastercard') OR o.ocardtype is null) and o.odate is null
FOR XML PATH('')), 1, 2, '')
FROM
oitems a
GROUP BY
a.CatalogId
)C
ON
B.CatalogId = C.CatalogId