通过本实验加深对SQL Server 2000环境下数据定义语言的理解，能够熟练地建立数据库，并通过SQL语句来建立一个新的SQL Server设备管理数据库，使用SQL的数据定义功能建立数据库中的各个基本表（共3个），并按要求对有关表进行修改。 每次操作后通过企业管理器查看有关对象的变化。创建和修改基本表、创建和取消索引。-Through better understanding of this experiment under SQL Server 2000 data definition language understanding, able to skillfully build up a database, and through the SQL statements to create a new SQL Server Device Manager database, use SQL data definition, function to establish a database of all the basic table (a total of three), as required on the table to edit. After each operation through the Enterprise Manager view information about the object changes. Create and modify the basic form, the creation and abolition of the index.