Question

WorkQueueItem包含唯一请求，有些请求失败并且其他请求失败。

Tag表返回与请求相关的所有标记。请求可以包含多个标记，也可以不包含任何标记。

我正在尝试按照没有“转发”标记的异常类型对所有失败请求进行分组。我确实得到了“重复请求”和“虚拟请求”，它们没有“转发”标签，但“无法完成”确实有“转发”标签，但它也有这个“延期”标签，并且还会返回。

我根本不想得到'无法完成'，因为它与某个地方的'转发'相关联。

如何获取没有与其关联的转发标记的请求？

通缉结果：

WorkQueueItem包含唯一请求，有些请求失败并且其他请求失败。

Tag表返回与请求相关的所有标记。请求可以包含多个标记，也可以不包含任何标记。

我正在尝试按照没有“转发”标记的异常类型对所有失败请求进行分组。我确实得到了“重复请求”和“虚拟请求”，它们没有“转发”标签，但“无法完成”确实有“转发”标签，但它也有这个“延期”标签，并且还会返回。

我根本不想得到'无法完成'，因为它与某个地方的'转发'相关联。

如何获取没有与其关联的转发标记的请求？

通缉结果:(我之前添加了标签栏只是为了帮助理解发生了什么，我不想要它）

+---+--------------------+-------+
|   | Exception          | Count |
+---+--------------------+-------+
| 1 | Duplicate Request  | 1     |
+---+--------------------+-------+
| 2 | Dummy Request      | 1     |
+---+--------------------+-------+

目前的结果：

+---+--------------------+-------+----------+
|   | Exception          | Count | tag      |
+---+--------------------+-------+----------+
| 1 | Duplicate Request  | 1     | NULL     |
+---+--------------------+-------+----------+
| 2 | Dummy Request      | 1     | Deferred |
+---+--------------------+-------+----------+
| 3 | Could not Complete | 1     | Deferred |
+---+--------------------+-------+----------+

当前查询：

SELECT  exceptionreason as Exception,
        COUNT(exceptionreason) as Count,
        tag

FROM [myDB].[dbo].[WorkQueueItem]
JOIN myDB.dbo.WorkQueue
ON WorkQueue.ident = WorkQueueItem.queueident
LEFT JOIN myDB.dbo.WorkQueueItemTag
ON WorkQueueItem.ident = WorkQueueItemTag.queueitemident
LEFT JOIN myDB.dbo.Tag
ON WorkQueueItemTag.tagid = Tag.id

WHERE name='TestQueue' 
AND exception is not null
AND (NOT Tag.tag LIKE '%Forwarded%' OR Tag.tag is null)
Group by exceptionreason, tag

我希望这里有足够的信息。感谢任何帮助。谢谢。

编辑：添加数据集

WorkQueueItem

+---+--------+------------+--------------------+------------+
|   | ident  | exception  | exceptionreason    | completed  |
+---+--------+------------+--------------------+------------+
| 1 | 192947 | 2017-05-25 | Dummy Request      | NULL       |
+---+--------+------------+--------------------+------------+
| 2 | 194990 | NULL       | NULL               | 2017-05-25 |
+---+--------+------------+--------------------+------------+
| 3 | 194994 | 2017-05-25 | Duplicate Request  | NULL       |
+---+--------+------------+--------------------+------------+
| 4 | 194995 | 2017-05-25 | Could not Complete | NULL       |
+---+--------+------------+--------------------+------------+

WorkQueueItemTag

+---+----------------+-------+
|   | queueitemident | tagid |
+---+----------------+-------+
| 1 | 192947         | 14904 |
+---+----------------+-------+
| 2 | 194995         | 14905 |
+---+----------------+-------+
| 3 | 194995         | 14906 |
+---+----------------+-------+

标签

+---+-------+-----------+
|   | id    | tag       |
+---+-------+-----------+
| 1 | 14904 | Deferred  |
+---+-------+-----------+
| 2 | 14905 | Forwarded |
+---+-------+-----------+
| 3 | 14906 | Deferred  |
+---+-------+-----------+

Answer 1

这可能接近你想要的。

SELECT 
    WQI.exceptionreason, 
    COUNT(*) [Total] 
FROM 
    myDB.dbo.WorkQueueItem WQI 
WHERE 
    WQI.exception IS NOT NULL 
    AND EXISTS(SELECT 1 FROM myDB.dbo.WorkQueue WHERE ident = WQI.queueident AND name = 'TestQueue') 
    AND NOT EXISTS(
        SELECT 
            1 
        FROM 
            myDB.dbo.WorkQueueItemTag WQIT 
        WHERE 
            WQIT.queueitemident = WQI.ident 
            AND EXISTS(SELECT 1 FROM myDB.dbo.Tag WHERE id = WQIT.tagid AND tag LIKE '%Forwarded%') 
    ) 
GROUP BY 
    WQI.exceptionreason;

Answer 2

一种简单的方法是使用相关的子查询和NOT IN

declare @WorkQueueItem table (ident int, exception datetime, exceptionreasion varchar(128), completed datetime)
insert into @WorkQueueItem
values
(192947,'2017-05-25','Dummy Request',NULL),
(194990,NULL,NULL,'2017-05-25'),
(194994,'2017-05-25','Duplicate Request',NULL),
(194995,'2017-05-25','Could not Complete',NULL)

declare @WorkQueueItemTag table (queueitemindent int, tagid int)
insert into @WorkQueueItemTag
values
(192947,14904),
(194995,14905),
(194995,14906)

declare @TAG table (id int, tag varchar(64))
insert into @TAG
values
(14904,'Deferred'),
(14905,'Forwarded'),
(14906,'Deferred')


select
    i.exceptionreasion
    ,count(*)
from @WorkQueueItem i
where i.ident not in (select i.ident
                    from @WorkQueueItem i
                    left join @WorkQueueItemTag it on it.queueitemindent = i.ident
                    left join @TAG t on t.id = it.tagid
                    where t.tag = 'Forwarded' )
and i.exceptionreasion is not null
group by 
    i.exceptionreasion

Answer 3

看起来您正在寻找条件聚合，如下所示：

 SELECT  exceptionreason as Exception,
        SUM(case when Tag.tag LIKE '%Forwarded%' or Tag.tag is null then 0 else 1 end) as Count,
        tag

FROM [myDB].[dbo].[WorkQueueItem]
JOIN myDB.dbo.WorkQueue
ON WorkQueue.ident = WorkQueueItem.queueident
LEFT JOIN myDB.dbo.WorkQueueItemTag
ON WorkQueueItem.ident = WorkQueueItemTag.queueitemident
LEFT JOIN myDB.dbo.Tag
ON WorkQueueItemTag.tagid = Tag.id

WHERE name='TestQueue' 
AND exception is not null
----AND (NOT Tag.tag LIKE '%Forwarded%' OR Tag.tag is null)
Group by exceptionreason, tag

如何排除与特定值无关的结果

3 个答案: