我刚接触这个数据库，现在老师上课讲到创建表，，有两种方法，一种直接什么。。。还有就是用sql语句，我看第一句中方法很方便，为什么还要学习第二种，虽然现在还没开始学习第二种方法，
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第一种是手工操作,通过微软件提供的工具创建.
第二种是SQL语句操作,一般是在程序中使用.所以如果是软件开发人员,应该掌握这种方法.
其相关内容见下:
- SQL code
CREATE TABLE创建新表。语法CREATE TABLE [ database_name.[ owner ] .| owner.] table_name ( { < column_definition > | column_name AS computed_column_expression | < table_constraint > ::= [ CONSTRAINT constraint_name ] } | [ { PRIMARY KEY | UNIQUE } [ ,...n ] ) [ ON { filegroup | DEFAULT } ] [ TEXTIMAGE_ON { filegroup | DEFAULT } ] < column_definition > ::= { column_name data_type } [ COLLATE < collation_name > ] [ [ DEFAULT constant_expression ] | [ IDENTITY [ ( seed , increment ) [ NOT FOR REPLICATION ] ] ] ] [ ROWGUIDCOL] [ < column_constraint > ] [ ...n ] < column_constraint > ::= [ CONSTRAINT constraint_name ] { [ NULL | NOT NULL ] | [ { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] [ WITH FILLFACTOR = fillfactor ] [ON {filegroup | DEFAULT} ] ] ] | [ [ FOREIGN KEY ] REFERENCES ref_table [ ( ref_column ) ] [ ON DELETE { CASCADE | NO ACTION } ] [ ON UPDATE { CASCADE | NO ACTION } ] [ NOT FOR REPLICATION ] ] | CHECK [ NOT FOR REPLICATION ] ( logical_expression ) } < table_constraint > ::= [ CONSTRAINT constraint_name ] { [ { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] { ( column [ ASC | DESC ] [ ,...n ] ) } [ WITH FILLFACTOR = fillfactor ] [ ON { filegroup | DEFAULT } ] ] | FOREIGN KEY [ ( column [ ,...n ] ) ] REFERENCES ref_table [ ( ref_column [ ,...n ] ) ] [ ON DELETE { CASCADE | NO ACTION } ] [ ON UPDATE { CASCADE | NO ACTION } ] [ NOT FOR REPLICATION ] | CHECK [ NOT FOR REPLICATION ] ( search_conditions ) }
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