Question

我在SSRS中使用了一个查询，用于按每个日期显示所有客户端名称，记录数。我的问题是下面的查询只显示那个特定日期有数据的人。很多时候，客户可能没有几天或几周的数据，而且此报告仅显示客户端有数据。我可以显示客户的完整列表，即使他们可能会返回0条记录吗？我不知道使用我的CTE设置是否可行。

例如：

客户A：0

客户B：10

客户C：0

客户D：35

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;


WITH CTE AS (

select c.ClientName, convert(char(10), h.RecordDate, 120) As Date, COUNT(*) As Count
from clientHistory h 
inner join client c on c.ClientID = h.clientid
where convert(char(10), h.RecordDate, 120) > DATEADD(DAY, -15, GETDATE())
group by c.ClientName, convert(char(10), h.RecordDate, 120)

)

select c.ClientName, Date, Sum(Count) As Count 
from CTE
group by c.ClientName, Date order by ClientName

Answer 1

如果要检索每个客户端，请从客户端表中选择并左键加入clientHistory表：

select c.ClientName, convert(char(10), h.RecordDate, 120) As Date, COUNT(*) As Count
from  client c
left join clientHistory h 
    on c.ClientID = h.clientid
    and convert(char(10), h.RecordDate, 120) > DATEADD(DAY, -15, GETDATE())
group by c.ClientName, convert(char(10), h.RecordDate, 120)

Answer 2

我猜你需要日历表

;WITH calender
     AS (SELECT convert(date,'2014-01-01') AS dates  -- Replace with startdate
         UNION ALL
         SELECT Dateadd(dd, 1, dates)
         FROM   calender
         WHERE  dates < '2014-12-31'), -- Replace with enddate
     CTE1
     AS (SELECT *
         FROM   (SELECT DISTINCT ClientName
                 FROM   client) a
                CROSS JOIN calender),
     cte2
     AS (SELECT c.ClientName,
                CONVERT(CHAR(10), h.RecordDate, 120) AS Date,
                Count(*)                             AS Count
         FROM   clientHistory h
                INNER JOIN client c
                        ON c.ClientID = h.clientid
         WHERE  CONVERT(CHAR(10), h.RecordDate, 120) > Dateadd(DAY, -15, Getdate())
         GROUP  BY c.ClientName,
                   CONVERT(CHAR(10), h.RecordDate, 120))
SELECT a.ClientName,
       a.Dates,
       Sum(Count) AS Count
FROM   CTE1 a
       LEFT JOIN cte2 b
              ON a.dates = b.Date
                 AND a.ClientName = b.ClientName
GROUP  BY a.ClientName,
          a.Dates
ORDER  BY ClientName 
Option (Maxrecursion 0)

即使没有数据，也会显示所有可用列

2 个答案: