Sql-Server-2008
儲存過程從具有變數約束的變數創建表
我已經設法使用儲存過程來創建具有變數名的表的副本。但我很難理解如何將約束合併到儲存過程中。
問題:約束必須是一個變數,因為當它複製一個表時,它不能命名我擁有的 PK 與以前使用的相同。我在這些區域遇到語法錯誤。
我對 SQL Server 很陌生…今天才剛剛開始學習!!所以請用虛擬術語解釋。
到目前為止的程式碼如下:
CREATE PROCEDURE procFinancialPeriodTable (@TABLENAME as varchar (50)) AS DECLARE @SQL varchar(2000) --SET @SQL = "if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[@TABLENAME]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) --drop table [dbo].[@TABLENAME] BEGIN SELECT @SQL = 'CREATE TABLE ' + @TABLENAME + '(' SELECT @SQL = @SQL + '[ID] [int] IDENTITY(1,1) NOT NULL,[FinPeriodNr] [int] NOT NULL,[FinCurrentPeriod] [bit] NULL,[FinStart] [date] NULL,[FinEnd] [date] NULL,[FinStatusOpen] [bit] NOT NULL,[PeriodClosedTS] [smalldatetime] NULL,[PeriodClosedUID] [varchar](3) NULL,)' CONSTRAINT [PK_FinancialPeriod' + @TABLENAME + '_1] PRIMARY KEY CLUSTERED( [FinPeriodNr] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] EXEC(@SQL) SET NOCOUNT ON; END
您的邏輯似乎很好,您收到語法錯誤,因為您沒有正確分隔字元串。
[PeriodClosedUID] [varchar](3) NULL,)' <-- problem
此外,輸入和縮進的自由也是非常有幫助的,所以像這樣的問題不會隱藏 4 個螢幕,只能通過水平捲動條訪問。
CREATE PROCEDURE dbo.procFinancialPeriodTable -- always use schema prefix @TABLENAME SYSNAME AS BEGIN -- use body wrappers around whole body SET NOCOUNT ON; -- put this at the beginning - no point in setting it at the end DECLARE @SQL NVARCHAR(MAX); -- dynamic SQL should always be Unicode SELECT @SQL = 'CREATE TABLE dbo.' + QUOTENAME(@TABLENAME) + '(' + '[ID] [int] IDENTITY(1,1) NOT NULL,[FinPeriodNr] [int] NOT NULL, [FinCurrentPeriod] [bit] NULL,[FinStart] [date] NULL, [FinEnd] [date] NULL,[FinStatusOpen] [bit] NOT NULL, [PeriodClosedTS] [smalldatetime] NULL,[PeriodClosedUID] [varchar](3) NULL, CONSTRAINT [PK_FinancialPeriod_' + @TABLENAME + '_1] PRIMARY KEY CLUSTERED( [FinPeriodNr]));'; -- all those options you specified were verbose defaults EXEC sp_executesql @sql; -- instead of EXEC(@sql) END GO
一些連結: