[英]Counts and Averages in same query
SQL Server 2008
我有以下查询,并且我希望将平均值添加到查询中。
SELECT
CNTS.ID, CNTS.LOCATION, CNTS.CLASS, CNTS.DATE_YYYYMM,
CNTS.PHONE_Contacts, CNTS.VISITS, CNTS.Total_Contacts
FROM
(SELECT
A.ID, A.LOCATION, A.CLASS, A.DATE_YYYYMM,
SUM(CASE WHEN a.IST =1 AND a.RCH = 'Contact' THEN 1 ELSE NULL END) AS VISITS,
SUM(CASE WHEN a.IST = 0 AND a.RCH = 'Contact' THEN 1 ELSE NULL END) AS Phone_Contacts,
SUM(CASE WHEN a.RCH = 'Contact' THEN 1 ELSE NULL END) AS Total_Contacts
FROM
(SELECT DISTINCT
*,
CONVERT(NVARCHAR(6), [DATE], 112) AS DATE_YYYYMM,
FROM z) A
GROUP BY
A.ID, A.LOCATION, A.CLASS, A.DATE_YYYYMM) CNTS
期望的输出
id class date_yyyy phone_contacts vist_contacts total_contacts avg_phone_contacts_perid avg_visit_contacts_perid avg_total_contacts per id
1 start 201501 2 1 3
如果要获取单行总计-也让您的外部查询汇总数据。 带有适当的GROUP BY子句。
您已经按照ID,位置,类别和日期对数据进行了分组-现在按更高的粒度级别进行分组。 当您为每个ID请求单独的行时,无法获得avg_phone_contacts_perid
。 除非您希望在每行中看到相同的avg_phone_contacts_perid
值(例如进行比较),否则可以通过Windows函数AVG(...) OVER (...)
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