如何在 SQL 服务器中填充我的日期维度 Table 以获得具有此特定值的列？

Question

我在 SQL Server 2014 中运行以下查询以填充名为 DateDimension 的 table。

DECLARE @startdate datetime
   DECLARE @enddate datetime
SET @startdate = '01/01/2000'
   SET @enddate = '12/31/2018'
DECLARE @loopdate datetime
   SET @loopdate = @startdate
WHILE @loopdate <= @enddate
   BEGIN
INSERT INTO DateDimension VALUES (
   Day(@loopdate),
   Month(@loopdate), 
   Year(@loopdate), 
   CASE WHEN Month(@loopdate) IN (1, 2, 3) THEN 3 -- Since Financial Year starts in July, January to March is considered as Quarter 3
   WHEN Month(@loopdate) IN (4, 5, 6) THEN 4
   WHEN Month(@loopdate) IN (7, 8, 9) THEN 1
   WHEN Month(@loopdate) IN (10, 11, 12) THEN 2
   END,
   @loopdate,
   CONVERT(VARCHAR(10),@loopdate,111) 
   ) 

   SET @loopdate = DateAdd(d, 1, @loopdate)
   END

当前table的摘录，在运行之后上面的查询如下：

id  Day Month   Year quarter    date        datevarchar
1   1   1       2000    3    2000-01-01       1/1/2000
2   2   1       2000    3    2000-01-02       1/2/2000
3   3   1       2000    3    2000-01-03       1/3/2000
4   4   1       2000    3    2000-01-04       1/4/2000
5   5   1       2000    3    2000-01-05       1/5/2000

我需要 "quarter" 列来显示其值，如下所示：

   quarter
  Qr 3 2000

如果 "quarter" 列保持原样并添加一个新列以显示我想要的内容，那就更好了。我该怎么做？

Answer 1

您需要先将列添加到 DateDimension table，然后再运行查询。它将是一个 varchar(9) 列。

DECLARE @startdate datetime
   DECLARE @enddate datetime
SET @startdate = '01/01/2000'
   SET @enddate = '12/31/2018'
DECLARE @loopdate datetime
   SET @loopdate = @startdate
WHILE @loopdate <= @enddate
   BEGIN
INSERT INTO DateDimension VALUES (
   Day(@loopdate),
   Month(@loopdate), 
   Year(@loopdate), 
   CASE WHEN Month(@loopdate) IN (1, 2, 3) THEN 3 -- Since Financial Year starts in July, January to March is considered as Quarter 3
   WHEN Month(@loopdate) IN (4, 5, 6) THEN 4
   WHEN Month(@loopdate) IN (7, 8, 9) THEN 1
   WHEN Month(@loopdate) IN (10, 11, 12) THEN 2
   END,
   @loopdate,
   CONVERT(VARCHAR(10),@loopdate,111),
   CASE WHEN Month(@loopdate) IN (1, 2, 3) THEN 'Qr 3 ' + CONVERT(VARCHAR(4),Year(@loopdate))
   WHEN Month(@loopdate) IN (4, 5, 6) THEN 'Qr 4 ' + CONVERT(VARCHAR(4),Year(@loopdate))
   WHEN Month(@loopdate) IN (7, 8, 9) THEN 'Qr 1 ' + CONVERT(VARCHAR(4),Year(@loopdate))
   WHEN Month(@loopdate) IN (10, 11, 12) THEN 'Qr 2 ' + CONVERT(VARCHAR(4),Year(@loopdate))
   END
   ) 

   SET @loopdate = DateAdd(d, 1, @loopdate)
   END

如何在 SQL 服务器中填充我的日期维度 Table 以获得具有此特定值的列？

How do I populate my Date Dimension Table in SQL Server so as to get a column with this specific value?

sql-server

date

dimensional-modeling