SQL

Question

我创建了一个视图，并且工作正常（如下面的视图 "A" 所示）。现在我必须将另一个 Table 的列加入视图。我的作品显示在下面的视图 "B" 中。有谁知道正确的语法是什么？

(加入 LK_METRICS 使用 METRIC_NUMBER = METRIC_ID_OLD 添加[small title], [title], [demonstration], and [SLS] columns from metric tablesmall)

VIEW A

CREATE VIEW [dbo].[V_PS_DA]
AS  WITH
today AS
(   SELECT * 
    FROM dbo.LK_NET_WORK_DAYS 
    WHERE [DATE] = CAST(GETDATE() AS DATE)
)
SELECT 
  p.*,
  hrs.DATE_ORDINAL      ENTER_HRSC_ORDINAL,
  strt.DATE_ORDINAL     START_DATE_ORDINAL,
  ndt.DATE_ORDINAL      END_DATE_ORDINAL,
  today.DATE_ORDINAL    TODAY_ORDINAL,
FROM dbo.PS_DA p
LEFT JOIN dbo.LK_NET_WORK_DAYS hrs
  ON p.ENTER_HRSC = hrs.[DATE]
LEFT JOIN dbo.LK_NET_WORK_DAYS strt
  ON p.START_DATE = strt.[DATE]
LEFT JOIN dbo.LK_NET_WORK_DAYS ndt
  ON p.END_DATE = ndt.[DATE]
CROSS JOIN today;  
GO

VIEW B

CREATE VIEW [dbo].[V_PS_DA]
AS WITH
today AS
(   SELECT * 
    FROM dbo.LK_NET_WORK_DAYS -- This contains the date data needed
    WHERE [DATE] = CAST(GETDATE() AS DATE)
)
SELECT 
  p.*,
  hrs.DATE_ORDINAL      ENTER_HRSC_ORDINAL,
  strt.DATE_ORDINAL     START_DATE_ORDINAL,
  ndt.DATE_ORDINAL      END_DATE_ORDINAL,
  today.DATE_ORDINAL    TODAY_ORDINAL,
  kst.[Small Title] Small_Title,
  kt.[Title]    Title,
  kd.[Demonstration]  Demonstration,
  ks.SLS    SLS

FROM dbo.PS_DA p, dbo.LK_METRICS k
LEFT JOIN dbo.LK_NET_WORK_DAYS hrs
  ON p.ENTER_HRSC = hrs.[DATE]
LEFT JOIN dbo.LK_NET_WORK_DAYS strt
  ON p.START_DATE = strt.[DATE]
LEFT JOIN dbo.LK_NET_WORK_DAYS ndt
  ON p.END_DATE = ndt.[DATE]
CROSS JOIN today,
LEFT JOIN dbo.LK_METRICS k
  ON k.METRIC_ID_OLD = METRIC_NUMBER

Answer 1

你非常接近。你只是在那里发生了一些额外的事情。取出 FROM .. 行逗号后的位：

CREATE VIEW [dbo].[V_PS_DA]
AS WITH
today AS
(   SELECT * 
    FROM dbo.LK_NET_WORK_DAYS -- This contains the date data needed
    WHERE [DATE] = CAST(GETDATE() AS DATE)
)
SELECT 
  p.*,
  hrs.DATE_ORDINAL      ENTER_HRSC_ORDINAL,
  strt.DATE_ORDINAL     START_DATE_ORDINAL,
  ndt.DATE_ORDINAL      END_DATE_ORDINAL,
  today.DATE_ORDINAL    TODAY_ORDINAL,
  kst.[Small Title] Small_Title,
  kt.[Title]    Title,
  kd.[Demonstration]  Demonstration,
  ks.SLS    SLS

FROM dbo.PS_DA p
LEFT JOIN dbo.LK_NET_WORK_DAYS hrs
  ON p.ENTER_HRSC = hrs.[DATE]
LEFT JOIN dbo.LK_NET_WORK_DAYS strt
  ON p.START_DATE = strt.[DATE]
LEFT JOIN dbo.LK_NET_WORK_DAYS ndt
  ON p.END_DATE = ndt.[DATE]
CROSS JOIN today,
LEFT JOIN dbo.LK_METRICS k
  ON k.METRIC_ID_OLD = METRIC_NUMBER

唯一的另一件事是指定 table METRIC_NUMBER 来自哪个。那是 p.METRIC_NUMBER 吗？它可能不会对整体产生影响，因为您可能只有一个 table 字段 METRIC_NUMBER 但 SQL 尽可能明确是个好主意。

最后，您可以在 SELECT 语句中使用 K table 中的字段，例如：

CREATE VIEW [dbo].[V_PS_DA]
AS WITH
today AS
(   SELECT * 
    FROM dbo.LK_NET_WORK_DAYS -- This contains the date data needed
    WHERE [DATE] = CAST(GETDATE() AS DATE)
)
SELECT 
  p.*,
  k.somefield,
  k.someotherfield,
  hrs.DATE_ORDINAL      ENTER_HRSC_ORDINAL,
  strt.DATE_ORDINAL     START_DATE_ORDINAL,
  ndt.DATE_ORDINAL      END_DATE_ORDINAL,
  today.DATE_ORDINAL    TODAY_ORDINAL,
  kst.[Small Title] Small_Title,
  kt.[Title]    Title,
  kd.[Demonstration]  Demonstration,
  ks.SLS    SLS

FROM dbo.PS_DA p
LEFT JOIN dbo.LK_NET_WORK_DAYS hrs
  ON p.ENTER_HRSC = hrs.[DATE]
LEFT JOIN dbo.LK_NET_WORK_DAYS strt
  ON p.START_DATE = strt.[DATE]
LEFT JOIN dbo.LK_NET_WORK_DAYS ndt
  ON p.END_DATE = ndt.[DATE]
CROSS JOIN today,
LEFT JOIN dbo.LK_METRICS k
  ON k.METRIC_ID_OLD = METRIC_NUMBER

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