无法在SQL中获取此表和约束

Question

I'm doing this exercise and and I can't get it right - can anybody help me this?

Write a second script called 2_CreateTables.sql that will create the Department and Employees tables in the FinalExam database with the following information:

Department table Information:

Column Name     Data Type                         Allow Nulls?
--------------------------------------------------------------
DepartmentID    Integer                           No
DepartmentName  Variable length character data    No
GroupName       Variable length character data    Yes
ModifiedDate    Small date and time               No

AutoNumber:

Make the DepartmentID automatically number starting with 100 and increment by 5.

Constraints :

1. The DepartmentID column will be defined as a clustered primary key called PK_Department_DepartmentID .

2. The ModifiedDate column will have a default constraint called DF_DeptModified with the system date and time as the default value.

This is what I have so far.

CREATE TABLE Deparment
    DeparmentID  int not null,
    DeparmentName varchar(100) not null,
    GroupName varchar(50) null,
    ModifiedDate datetime  not null,

Answer 1

Assuming you're using SQL Server - try this:

CREATE TABLE dbo.Department
    (DepartmentID INT IDENTITY(100, 5) NOT NULL,
     DepartmentName VARCHAR(100) NOT NULL,
     GroupName VARCHAR(50) NULL,
     ModifiedDate SMALLDATETIME NOT NULL
        CONSTRAINT DF_DeptModified DEFAULT(GETDATE()),

     CONSTRAINT PK_Department_DepartmentID
       PRIMARY KEY CLUSTERED (DepartmentID)
    )
GO

Changes made:

• make sure you have starting and ending parenthesis ( ) after your CREATE TABLE (name) statement
• added the IDENTITY(100, 5) clause to the DepartmentID to make it auto-numbering according to the requirements
• changed the datatype of ModifiedDate to be SMALLDATETIME as defined in the textual requirements (you had DATETIME )
• fixed all the Deparment to Department
• added the default constraint for ModifiedDate
• added the table constraint for the clustered primary key