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CREATE TABLE [dbo].[AdminTest] (
[AdminTestId] INT IDENTITY (1, 1) NOT NULL,
[Title] NVARCHAR (100) NOT NULL,
[CreatedBy] INT NOT NULL,
[CreatedDate] DATETIME NOT NULL,
[ModifiedBy] INT NOT NULL,
[ModifiedDate] DATETIME NOT NULL,
[TestLevelId] INT NOT NULL,
[TestStatusId] INT NOT NULL,
[ExamId] INT NOT NULL,
[Text] NVARCHAR (MAX) NULL,
[Sequence] INT DEFAULT ((1)) NOT NULL,
[Release] NVARCHAR (50) DEFAULT ((1)) NOT NULL,
[Version] ROWVERSION NOT NULL,
[Price] MONEY DEFAULT ((0)) NOT NULL,
[ReleaseDate] DATETIME NULL,
[Code] VARCHAR (10) DEFAULT (LEFT(newid(), (5))) NOT NULL
);
我设置代码列有一个默认的,但我怎样才能使它Code Code列有一个至少5个字符的值?如何在SQL Server中需要最少数量的字符?
创建检查约束:http://technet.microsoft.com/en-us/library/ms188258(v=sql.105 ).aspx – 2014-10-05 10:06:59
使用check constranint:'check(length(code)> = 5)'? (我不确定在SQL Server中是否存在'length()',但是一些具有相似名称的函数必须存在) – 2014-10-05 10:07:16