oracle中建表後添加註釋

--------------------------------------------------------1：建表語句----------------------------------------------------

create table EMP
(
EMPNO NUMBER(4) PRIMARY KEY,
ENAME VARCHAR2(10),
JOB VARCHAR2(9),
MGR NUMBER(4),
HIREDATE DATE,
SAL NUMBER(7,2),
DEPNO NUMBER(4)
);

--------------------------------------------------------2：添加表註釋--------------------------------------------------

COMMENT ON TABLE EMP IS '學生信息表';

--------------------------------------------------------3：添加字段註釋------------------------------------------------

COMMENT ON COLUMN EMP.EMPNO IS '學號';COMMENT ON COLUMN EMP.ENAME IS '姓名';COMMENT ON COLUMN EMP.JOB IS '郵箱';COMMENT ON COLUMN EMP.MGR IS '性別';COMMENT ON COLUMN EMP.HIREDATE IS '入職日期';COMMENT ON COLUMN EMP.SAL IS '薪資';COMMENT ON COLUMN EMP.DEPNO IS '部門編號';