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我正在尝试在 SQL Server 中创建一个表值函数。我的问题是我找不到正确的 SQL 语法。我不断收到错误。我不知道是否可以execute()在表值函数中使用方法。我尝试过声明和设置变量，并在普通的 sql 查询中使用 execute 方法，它可以工作。

我的 SQL：

CREATE FUNCTION SortRoutePartByDay
(   
    @date datetime
)
RETURNS TABLE 
AS
Begin
    declare @cmdtext varchar(max)  
    declare @Daynameofweek varchar(10)
    set @Daynameofweek = datename(weekday, @date)
    set @cmdtext =  'select * from RoutePartPart where ' +@Daynameofweek+' =1';

    RETURN 
    (
        execute(@cmdtext)
    )
GO

到目前为止，我的错误是：

消息 156，级别 15，状态 1，过程 SortRoutePartByDay，第 21 行
关键字“执行”附近的语法不正确。
消息 102，级别 15，状态 1，过程 SortRoutePartByDay，第 23 行
')' 附近的语法不正确。

RoutePartPart DDL：

    CREATE TABLE [dbo].[RoutePartPart](
        [RouteID] [int] NOT NULL,
        [RoutePartNo] [smallint] NOT NULL,
        [RoutePartPartNo] [smallint] NOT NULL,
        [PickupAreaGrpID] [int] NULL,
        [DeliveryAreaGrpID] [int] NULL,
        [Monday] [bit] NULL,
        [Tuesday] [bit] NULL,
        [Wednesday] [bit] NULL,
        [Thursday] [bit] NULL,
        [Friday] [bit] NULL,
        [Saturday] [bit] NULL,
        [Sunday] [bit] NULL,
        [Pickup] [bit] NULL,
        [Delivery] [bit] NULL,
        [Types] [varchar](10) NULL
    ) ON [PRIMARY]
4

1 回答 1

5

我认为在你的情况下使用动态 SQL 是不必要的，所以试试这个 -

询问：

CREATE FUNCTION SortRoutePartByDay
(   
    @date DATETIME
)
RETURNS TABLE 
AS RETURN
     SELECT * 
     FROM dbo.RoutePartPart 
     WHERE DATENAME(weekday, @date) = 1

小资料：

SQL Server 上的函数与存储过程不同，它们对可以做的事情有一些限制。例如，您不能使用动态 SQL。

更新：

CREATE FUNCTION SortRoutePartByDay
(   
    @date DATETIME
)
RETURNS TABLE 
AS RETURN
     SELECT p.* 
     FROM dbo.RoutePartPart p
     CROSS JOIN (
          SELECT [WeekDay] = DATENAME(weekday, @date)    
     ) t 
     WHERE ([WeekDay] = 'Monday' AND [Monday] = 1)
          OR ([WeekDay] = 'Tuesday' AND [Tuesday] = 1)
          OR ([WeekDay] = 'Wednesday' AND [Wednesday] = 1)
          OR ([WeekDay] = 'Thursday' AND [Thursday] = 1)
          OR ([WeekDay] = 'Friday' AND [Friday] = 1)
          OR ([WeekDay] = 'Saturday' AND [Saturday] = 1)
          OR ([WeekDay] = 'Sunday' AND [Sunday] = 1)
于 2013-07-18T05:44:34.300 回答