sqlserver建表时设置字段初始默认值的示例

IF EXISTS (SELECT * FROM sys.all_objects WHERE object_id = OBJECT_ID(N'[dbo].[Employee]') AND type IN ('U'))
DROP TABLE [dbo].[Employee]

CREATE TABLE Employee (
    ID INT PRIMARY KEY,
	FirstName NVARCHAR(50),
    LastName NVARCHAR(50),
    EmailAddress NVARCHAR(100) DEFAULT NULL,
	Name VARCHAR(50) default '张三',
    Age INT DEFAULT 18
);