Oracle中建立表

-- Create table

create table STUDENT
(
sno VARCHAR2(3) not null,
sname VARCHAR2(8) not null,
ssex VARCHAR2(3) not null,
sbirthday DATE,
sclass VARCHAR2(5)
)
tablespace TEST
pctfree 10
initrans 1
maxtrans 255
storage
(
initial 64K
next 1M
minextents 1
maxextents unlimited
);
-- Add comments to the table
comment on table STUDENT
is '学生';
-- Add comments to the columns
comment on column STUDENT.sno
is '学号（主键）';
comment on column STUDENT.sname
is '学生姓名';
comment on column STUDENT.ssex
is '性别';
comment on column STUDENT.sbirthday
is '生日';
comment on column STUDENT.sclass
is '班级';