Question

我在SQL Server中有一个表，用于存储日期，数据库和事件数（CreateDate，DB_Name，Incident），我可以通过分组到以下内容进行聚合：

[CreateDate]  [DB_Name] [Count of Incidents]
20140214      tempdb       10  
20140215      tempdb       9  
20140217      tempdb       8
20140215      msdb         10    
20140218      msdb         11

但想要（用于图表和统计数据）：

[CreateDate]  [DB_Name] [Count of Incidents]
20140214      tempdb       10  
20140215      tempdb       9  
20140216      tempdb       0  
20140217      tempdb       8
20140218      tempdb       0  
20140214      msdb         0    
20140215      msdb         10    
20140216      msdb         0    
20140217      msdb         0    
20140218      msdb         11

我想把它放在一个视野中。我尝试过CTE，但没有看过“申请”。

欢呼并感谢您的帮助/建议。

Answer 1

我同意这样的评论：日历表可以让您的生活变得更轻松，因为它可以用于您的数据库中的多种用途，但是如果您想仅使用提供的信息创建视图，则这是一个递归的CTE解决方案

/*
--      Create Base Table
If      Object_ID('GappedHistory') Is Not Null Drop Table GappedHistory;
Create  Table GappedHistory (CreateDate Date, DBName Varchar(50), CntOfIncidents Int);
Insert  GappedHistory (CreateDate, DBName, CntOfIncidents)
Values  ('2014-02-14', 'tempdb', 10),
        ('2014-02-15', 'tempdb', 9),
        ('2014-02-17', 'tempdb', 8),
        ('2014-02-15', 'msdb', 10),
        ('2014-02-18', 'msdb', 11);
Go
*/

--      Build the view
Create  View vwAllDatesResults
As
With    dates As
(
        Select  Distinct
                DBName, 
                Min(CreateDate) Over (Order By CreateDate) As rangeDates,
                Max(CreateDate) Over (Order By CreateDate Desc) As maxCreateDate
        From    GappedHistory g
        Union   All
        Select  DBName,
                DateAdd(Day,1,rangeDates),
                maxCreateDate
        From    dates
        Where   rangeDates < maxCreateDate      
),      recurCTE As
(
        Select  IsNull(g.CreateDate, m.rangeDates) As CreateDate,
                IsNull(g.DBName, m.DBName) As DBName,
                IsNull(g.CntOfIncidents,0) As CntOfIncidents
        From    GappedHistory g
        Full    Outer Join dates m
                On  g.CreateDate = m.rangeDates
                And g.DBName = m.DBName
)
Select  *
From    recurCTE
Go

--      Query the view
Select  *
From    vwAllDatesResults
Order   By DBName Desc, CreateDate

通过查询填充组中的空白

1 个答案: