标签: sql-view

我正在尝试创建一个安装脚本来一次安装多个视图。我尝试了通过网络找到的一些建议，但没有成功。该脚本将安装 6 个视图和一个索引。

USE [DB_NAme]
GO
SET XACT_ABORT ON
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO

在脚本顶部

我尝试过的事情：

BEGIN TRANSACTION
  CREATE VIEW [schema].[View_Name]
COMMIT TRANSACTION

错误，因为“CREATE VIEW”必须是查询批中的第一个语句。

BEGIN TRANSACTION
    BEGIN TRY
      CREATE VIEW [schema].[View_Name]
    END TRY
    BEGIN CATCH
      ERR CODE
    END CATCH
COMMIT TRANSACTION

还有一些其他的变化。

寻找一种在一个 .sql 文件中创建多个视图的方法：

检查并删除/创建索引检查并删除视图创建视图.. 其中 7 个

出于性能原因，我的数据库中有一个物化视图。环境的约束已经改变，现在我需要使更新出现得更快，视图本身的性能不再那么重要。如何将物化视图更改为常规视图？寻找类似的东西：

ALTER MATERIALIZED VIEW viewname TO VIEW

MySQL 的SQL视图功能是否有任何限制？

例:您可以使用"JOIN"命令创建表格视图吗？

我有以下存储过程创建一个视图:

ALTER PROC Proc_Guards_By_Client
(
    @client_number INT,
    @client_name   NVARCHAR(16)
)
AS
 BEGIN
   IF EXISTS(select * FROM sys.views where name = 'vwGuardsByClients')
   BEGIN
    EXEC ('CREATE VIEW vwGuardsByClients
    AS
    SELECT TOP 1000 
      cgt.[guard_id],
      sg.first_name,
      sg.last_name,
      sg.ammunition_quantity    
      FROM [sws4].[dbo].[client_guard_tracking] cgt
      INNER JOIN CLIENTS c
      ON c.client_number = cgt.client_number
      INNER JOIN security_guard sg
      ON sg.guard_id = cgt.guard_id
      WHERE cgt.client_number = @client_number
      OR c.client_name = @client_name
    ')
    END
    ELSE
    BEGIN
      EXEC ('UPDATE VIEW vwGuardsByClients
      SELECT TOP 1000 
      cgt.[guard_id],
      sg.first_name,
      sg.last_name,
      sg.ammunition_quantity    
      FROM [sws4].[dbo].[client_guard_tracking] cgt
      INNER …

有没有办法在视图中添加新列并更新它们？

列不在任何表中; 我想从表中选择几列,然后添加几个新列并更新它们.

我试图ALTER VIEW添加列,但它给了我一个错误:

无法更改'viewName',因为它不是表格.

我想更改一个已经存在的视图。Liquibase 中没有像 \changeView 或 \alterView 这样的东西吗？

我已经用 createView 创建了一个视图。我尝试使用谷歌搜索alterview或changeview，但没有任何正确的结果。

这是我的观点

 SELECT e.Text AS StatusText,
        a.Created AS [DATE],
        a.Username,
        b.Name AS CustomerName,
        c.Name AS ServiceName,
        d.Message AS DeviationMessage
   FROM dbo.StatusUpdate AS a
        LEFT OUTER JOIN dbo.Customer AS b ON a.CustomerId = b.CustomerID
        LEFT OUTER JOIN dbo.Service AS c ON a.ServiceId = c.ServiceID
        LEFT OUTER JOIN dbo.Deviation AS d ON a.DeviationId = d.DeviationID
        LEFT OUTER JOIN dbo.StatusText AS e ON a.Status = e.ID

我想要做的是:当a.Status(int)是2或3时,我想强制a.Username显示为NULL.我该怎么办呢？

create or replace view ABC_VIEW(
   VEHICLEID, BRAND,
   MODEL, VEHICLE_TYPE,
   FUEL_TYPE, TRANSMISSION_TYPE,
   GEARBOX, DRIVE_TYPE,
   VEHICLE_NUMBER, PRICE, 
   "TEST Column"
) as 
  select VEHICLEID, BRAND,
         MODEL, VEHICLE_TYPE,
         FUEL_TYPE, TRANSMISSION_TYPE,
         GEARBOX, DRIVE_TYPE,
         VEHICLE_NUMBER, PRICE, 
         '' as "TEST Column" 
    from ABC;

默认情况下"Test Column"创建为Char(1).如何将其更改为Number数据类型？

请帮帮我.谢谢.

我要创建一个视图，其中有 2 个 CTES。这就是我在下面所做的。第一部分很好，但是在“AND”之后事情就不起作用了。感谢您的意见

CREATE VIEW dbo.VW.SPAg
AS With today as 
(SELECT * FROM dbo.Work_Days
 WHERE [Date] = CAST(GETDATE() AS DATE)
)

AND WITH rd as
(SELECT [DATE] AS REP_DATE
 FROM dbo.Link_Days
 WHERE DAY ([DATE]) = 1
)
SELECT wm *,
gr.DATE_ORDINAL AS Goods_Rcvd_Ordinal
gt.DATE_ORDINAL AS Goods_Trnpt_Ordinal
today.DATE

FROM dbo.SPAg sg
INNER JOIN rd
  ON YEAR(sg.Client_Query)= YEAR(rd.REP_DATE)
LEFT JOIN dbo.Work_DAYS gr
ON sg.Goods_Rcvd = gr.[DATE]
LEFT JOIN dbo.Work_DAYS gt
ON sg.Goods_Trnpt = gt.[DATE]

I am trying to change a data type of a column in a Oracle View by executing the following statement:

ALTER VIEW <view_name> 
MODIFY (ID VARCHAR2(100));

I get the following error:

Error starting at line : 1 in command -
ALTER VIEW <view_name>
MODIFY (ID VARCHAR2(100))
Error report -
ORA-00922: missing or invalid option
00922. 00000 -  "missing or invalid option"
*Cause:    
*Action:

I referred to the post here. What's the correct way to achieve this? I guess Oracle …