Oracle函数问题！

Question

向表中增加列：
 alter table table_name
    add (column_or_constrain [, column_or_constrain...]

Answer 1

alter table table_name add (column_or_constrain [,字段类型]

Answer 2

先到ORACLE
网站注册用户
然后
http://otn.oracle.com/docs/products/oracle9i/doc_library/release2/index.htm

Answer 3

alter table tablename add (columnname type (not null)给你一个查函数的网站：ORACLE9i函数大全
http://lbdwww.epfl.ch/f/teaching/courses/oracle9i/server.920/a96540/functions2a.htm#80856