左连接计数来自第二个表的三个属性

Question

注意：我在这个数据库中没有写权限。

我有一个事务表，我需要在其中计算事务数：DONE

SELECT
unique_id, 
journey_files_id, 
version_template_code, 
Count (*) as cnt

FROM [XXX].[dbo].[CampaignResponse]
WHERE version_template_code LIKE '%FPQ%'
AND CAST(email_action_date AS DATE) >='02/01/2020' and CAST(email_action_date AS DATE) <='02/29/2020'

GROUP BY unique_id, journey_files_id, version_template_code ORDER BY cnt DESC

现在我需要使用 unique_id、journey_files_id、version_template_code 将此视图加入到第二个表中

当前查询无效：

SELECT DISTINCT *
FROM [XXX].[dbo].[EmailSend] a

LEFT JOIN
(
SELECT 
    unique_id, 
    journey_files_id, 
    version_template_code, 
    Count (email_action) as cnt

FROM [XXX].[dbo].[CampaignResponse]
WHERE version_template_code LIKE '%FPQ%'
AND CAST(email_action_date AS DATE) >='02/01/2020' and CAST(email_action_date AS DATE) <='02/29/2020'


) b ON a.unique_id = b.unique_id 
    AND a.journey_files_id = b.journey_files_id
    AND a.version_template_code = b.version_template_code

WHERE CAST(a.processed AS DATE) >='02/01/2020' and CAST(a.processed AS DATE) <='02/29/2020'
GROUP BY [id]
  ,a.[unique_id]
  ,a.[journey_files_id]
  ,a.[version_template_code]
  ,[ecrm_template_code]
  ,[lead_type]
  ,[quote_number]
  ,[email]
  ,[company_name]
  ,[sl_code]
  ,[kw_subject_line]
  ,[promo_line]
  ,[headline]
  ,[image_top]
  ,[learn_more]
  ,[tfn]
  ,[subhead_1]
  ,[body_copy_1]
  ,[subhead_2]
  ,[bullet_1]
  ,[offer]
  ,[video_img]
  ,[video_url]
  ,[video_copy]
  ,[legal]
  ,[kw_url_01]
  ,[kw_url_02]
  ,[variable_01]
  ,[variable_02]
  ,[tracking_pixel_url]
  ,[processed]
  ,b.cnt
  ,b.unique_id, b.journey_files_id, b.version_template_code
   ORDER BY b.unique_id

错误信息：

消息 8120，第 16 级，状态 1，第 8 行
列“AJM.dbo.CampaignResponse.unique_id”在选择列表中无效，因为它不包含在聚合函数或 GROUP BY 子句中。

这是有道理的 - 我似乎无法想出解决办法。

非常感谢您的帮助。

Answer 1

您不需要在内部查询之外使用group by，因为您没有在外部计算任何聚合值。您只需要一个简单的left join 如下：

SELECT DISTINCT *
FROM [XXX].[dbo].[EmailSend] a
left join (SELECT
unique_id, 
journey_files_id, 
version_template_code, 
Count (*) as cnt
FROM [XXX].[dbo].[CampaignResponse]
WHERE version_template_code LIKE '%FPQ%'
AND CAST(email_action_date AS DATE) >='02/01/2020' and CAST(email_action_date AS DATE) <='02/29/2020'
GROUP BY unique_id, journey_files_id, version_template_code) b
ON a.unique_id = b.unique_id AND a.journey_files_id = b.journey_files_id AND a.version_template_code = b.version_template_code 
ORDER BY cnt DESC

Answer 2

仅在该表中进行分组（为安全起见，还编辑了日期和日期范围）：

with b as 
(
SELECT
unique_id, 
journey_files_id, 
version_template_code, 
Count (*) as cnt

FROM [XXX].[dbo].[CampaignResponse]
WHERE version_template_code LIKE '%FPQ%'
AND CAST(email_action_date AS DATE) >='20200201' and CAST(email_action_date AS DATE) < '20200301'

GROUP BY unique_id, journey_files_id, version_template_code
)
SELECT DISTINCT *
FROM [XXX].[dbo].[EmailSend] a
LEFT JOIN
 b ON a.unique_id = b.unique_id 
    AND a.journey_files_id = b.journey_files_id
    AND a.version_template_code = b.version_template_code
WHERE CAST(a.processed AS DATE) >='20200201' and CAST(a.processed AS DATE) <'20200301'
   ORDER BY b.unique_id

编辑：如果您愿意，与子查询相同：

SELECT DISTINCT *
FROM [XXX].[dbo].[EmailSend] a
LEFT JOIN
(
SELECT
unique_id, 
journey_files_id, 
version_template_code, 
Count (*) as cnt

FROM [XXX].[dbo].[CampaignResponse]
WHERE version_template_code LIKE '%FPQ%'
AND CAST(email_action_date AS DATE) >='20200201' and CAST(email_action_date AS DATE) < '20200301'

GROUP BY unique_id, journey_files_id, version_template_code
)
 b ON a.unique_id = b.unique_id 
    AND a.journey_files_id = b.journey_files_id
    AND a.version_template_code = b.version_template_code
WHERE CAST(a.processed AS DATE) >='20200201' and CAST(a.processed AS DATE) <'20200301'
   ORDER BY b.unique_id;