sql语句相关操作

create user test identified by test
default tablespace users
temporary tablespace temp
quota 3M on users;

grant connect,resource to test with admin option;

conn test/test

show user;
alter user test identified by test1;//修改用户口令

grant create any view to scott;
revoke create any view from scott;

grant select,update on dept to public;//授予实体权限
revoke update on dept from public; //回收实体权限

create role app_user identified by hello; //创建角色
grant create view to app_user;  //授予创建视图权限
grant app_user to test; //角色授予用户，这些用户都具有这个角色的权限

create user WangMing identified by WangMing
default tablespace userwang
temporary tablespace tempwang
quota 3M on userwang;

create user LiYong identified by LiYong
default tablespace userli
temporary tablespace templi
quota 3M on userli;

CREATE USER WangMing IDENTIFIED BY WangMing
DEFAULT TABLESPACE users
TEMPORARY TABLESPACE temp
QUOTA 3M ON users;

CREATE USER LIYONG IDENTIFIED BY LIYONG
DEFAULT TABLESPACE users
TEMPORARY TABLESPACE temp
QUOTA 3M ON users;

GRANT CONNECT,RESOURCE to WangMing WITH ADMIN OPTION;
GRANT CONNECT,RESOURCE to LIYONG WITH ADMIN OPTION;

CREATE TABLE Mydept
(
   DNO VARCHAR2(10),
   DNAME VARCHAR2(10),
   MANAGER VARCHAR2(10),
   LOC VARCHAR2(10),
   PHONE VARCHAR(10),
   CONSTRAINT PK_Mydept PRIMARY KEY (DNO)
);

CREATE TABLE Myemp
(
   ENO VARCHAR2(10),
   ENAME VARCHAR2(10),
   AGE NUMBER(10),
   JOB VARCHAR2(10),
   SAL NUMBER(10),
   DNO VARCHAR2(10),
   CONSTRAINT PK_Myemp PRIMARY KEY (ENO),
   CONSTRAINT FK_Myemp_To_Mydept FOREIGN KEY (DNO) REFERENCES Mydept (DNO)
);
INSERT INTO Mydept VALUES('','SALES','ZHAOSI','WuHan','');
INSERT INTO Myemp VALUES('','LIYONG',26,'SALESMAN',3400,'');
INSERT INTO Myemp VALUES('','SCOTT',24,'SALESMAN',3400,'');
INSERT INTO Myemp VALUES('','WANGMING',24,'SALESMAN',3400,'');    

INSERT INTO scott.Mydept VALUES('','OFFICE','ZHANGHENG','BeiJing','');

GRANT select(MAX(SAL)) ON Myemp TO ZHANGXIN;

CREATE TABLE Employee
(
   ENO VARCHAR2(10),
   ENAME VARCHAR2(10),
   BIRTH VARCHAR(15),
   JOB VARCHAR2(10),
   SAL VARCHAR2(10),
   DNO VARCHAR2(10),
   STATE VARCHAR2(10),
   PRIMARY KEY(ENO),
   FOREIGN KEY(DNO) REFERENCE TO Department(DNO)
);
CREATE TABLE Department
(
   DNO VARCHAR2(10),
   DNAME VARCHAR2(10),
   MAGNO VARCHAAR2(10),
   LOC VARCHAR2(10),
   PHONE VARCHAR2(12),
   PRIMARY KEY(DNO)
);

CREATE TABLE Teacher
(
   Eno NUMERIC(4),
   Sal NUMERIC(7，2),
   PJob char(10),
   CONSTRAINT PK_Teacher PRIMARY KEY(Eno) VALIDATE
);

CREATE OR REPLACE TRIGGER Insert_Or_Update_Sal
BEFORE INSERT OR UPDATE ON Teacher
FOR EACH ROW
WHEN((NEW.PJob='教授') AND (new.Sal<4000))
BEGIN
   select 4000 into:new.Sal from dual;
END;
/

INSERT INTO Teacher VALUES('','','教授');
INSERT INTO Teacher VALUES('','','教授');
INSERT INTO Teacher VALUES('','','教授');

CREATE TABLE Sal_log
(
   Eno NUMERIC(4),
   Sal NUMERIC(7,2),
   Username char(80),
   DDate TIMESTAMP,
   CONSTRAINT PK_Sal_log PRIMARY KEY(Eno)
);

CREATE OR REPLACE TRIGGER Insert_Sal
AFTER INSERT ON Teacher
FOR EACH ROW
BEGIN
  INSERT INTO Sal_log VALUES(:new.Eno,:new.Sal,user,sysdate);
END;
/

CREATE TABLE Department
(
   No NUMBER(12),
   Name CHAR(40),
   PRIMARY KEY(No)
);

CREATE TABLE Students
(
   No NUMBER(12),
   Name CHAR(8),
   Sex INTEGER DEFAULT 0,
   Birthday DATE,
   Class CHAR(40),
   DeptNo NUMBER(12),
   PRIMARY KEY(No),
   FOREIGN KEY(DeptNo) REFERENCES Department(No)
);

CREATE TABLE Course
(
   No NUMBER(12),
   Name CHAR(8),
   Credit FLOAT,
   PRIMARY KEY(No)
);

CREATE TABLE SC
(
   CNo NUMBER(12),
   SNo NUMBER(12),
   Grade FLOAT,
   PRIMARY KEY(CNo,SNo),
   FOREIGN KEY(CNo) REFERENCES Course(No),
   FOREIGN KEY(SNo) REFERENCES Students(No)
);

CREATE TABLE SC_U
(
   CNo NUMBER(12),
   SNo NUMBER(12),
   Oldgrade FLOAT,
   Newgrade FLOAT
);

CREATE OR REPLACE TRIGGER SC_T
AFTER UPDATE OF Grade ON SC
FOR EACH ROW
WHEN (NEW.Grade>=1.1*OLD.Grade)
BEGIN
  INSERT INTO SC_U(SNo,CNo,OldGrade,NewGrade)
        VALUES(:OLD.SNo, :OLD.CNo, :OLD.Grade, :NEW.Grade);
END;
/

CREATE TABLE StudentInsertLog
(
   InsertDate DATE,
   InsertNumber NUMBER(12),
   Operator CHAR(20)
);

CREATE OR REPLACE TRIGGER Student_Count
AFTER INSERT ON Students
DECLARE
   ICount NUMBER(12);
   temp NUMBER(12);
BEGIN
   SELECT COUNT(*) INTO temp FROM StudentInsertLog;
   SELECT COUNT(*) INTO ICount FROM Students;
   IF(temp<>0) THEN
   SELECT InsertNumber INTO temp FROM StudentInsertLog
      WHERE InsertDate = (SELECT MAX(InsertDate) FROM　StudentInsertLog);
END IF;
INSERT INTO StudentInsertLog (InsertDate, InsertNumber, Operator)
   VALUES(SYSDATE, ICount-temp,user);
END;
/