1.给表增加列:
alter table t_line_info add(OPERATOR VARCHAR2(20),OPERATETIME VARCHAR2(20));
2.给表和列增加注释:
comment on column T_COMPANY_INFO.OPERATOR is '操作人';
comment on column T_COMPANY_INFO.OPERATETIME is '操作时间';
comment on table T_COMPANY_INFO is '公司基本信息';