Question

我有一个包含主要表格列createon（date）＆amp;的CRM数据库createat（time）。我们称之为表A

有一个辅助表，用于记录有关尝试联系在A中创建的记录时所采取的活动的数据，让我们调用此表B.

我正在尝试编写一个tSQL查询，它将显示在A＆amp; A中创建记录之间的平均时间。第一个活动记录在B.

这是我到目前为止所做的：

SELECT
    B.userid,
    avg(cast(datediff(MINUTE, A.createat, B.ontime) as float)) 
    AS 'AVG TIME FROM LEAD CREATION TO FIRST LOGGED ACTIVITY'
FROM 
    TableA A, TableB B
WHERE 
    A.KEY_value = B.KEY_value
    AND B.USERID in ('USER1','USER2','USER3','USER4','USER5')
    AND B.ONDATE > '09/01/2014' 
GROUP BY 
    B.USERID
HAVING 
    B.ontime = min(B.ontime)

如果我删除'having'子句，查询将会起作用，但我无法确定我是否得到了表B中第一次记录活动的时间（min（B.ontime））

我仍然是一个SQL新手所以任何帮助/指导都将非常感谢！

Answer 1

要做的一种方法是为子查询中的每个用户按时间最小化，并与表A一起加入。

SELECT
    T.userid,
    ISNULL(avg(cast(datediff(MINUTE, cast(A.createat as datetime)+A.createdon, T.MinOnTime) as float)),0) 
    AS [AVG TIME FROM LEAD CREATION TO FIRST LOGGED ACTIVITY]
FROM 
TableA A
LEFT JOIN ( SELECT Key_value, userid, min(cast(B.ontime as datetime) + B.ondate) as MinOnTime FROM 
                TableB B
                WHERE B.USERID in ('USER1','USER2','USER3','USER4','USER5')
                      AND B.ONDATE > '09/01/2014' 
                GROUP BY KEY_Value, userid
              )  T
on  A.KEY_value = T.KEY_value
GROUP BY T.userid

Answer 2

    SELECT
        t.userid
        ,case when A.createon = B.ondate then avg(cast(datediff(MINUTE, A.createat, B.ontime) as float))
            else avg(datediff(MINUTE, A.createon, B.ondate)+(cast(datediff(MINUTE, A.createat, B.ontime) as float)))
                end  as 'AVG TIME FROM LEAD CREATION TO FIRST LOGGED ACTIVITY'
    FROM 
    TableA a
        LEFT JOIN ( SELECT Key_value, userid, min(B.ontime) as MinOnTime 
                    FROM TableB b
                    WHERE b.USERID in ('USER1','USER2','USER3','USER4','USER5')
                          and b.ondate > '2014/09/01' 

                    GROUP BY KEY_Value, userid) t on a.KEY_value = t.KEY_value
GROUP BY 
t.userid

Answer 3

SELECT
    B.userid,
    avg(cast(datediff(MINUTE, A.createat, min(B.ontime)) as float)) 
    AS 'AVG TIME FROM LEAD CREATION TO FIRST LOGGED ACTIVITY'
FROM 
    TableA A, TableB B
WHERE 
    A.KEY_value = B.KEY_value
    AND B.USERID in ('USER1','USER2','USER3','USER4','USER5')
    AND B.ONDATE > '09/01/2014' 
GROUP BY 
    B.USERID

tSQL：获取从创建记录到首次联系的平均时间

3 个答案: