--創建表空間
CREATE TABLESPACE mydb
DATAFILE 'D:\Oracle\mydb.dbf'
SIZE 5M
--創建用戶
CREATE USER admin_1 IDENTIFIED BY 123456
DEFAULT Tablespace mydb
--賦值權限
GRANT CONNECT,RESOURCE TO ADMIN_1
--移出權限
REMOVE CONNECT,RESOURCE TO ADMIN_1
--刪除用戶
DROP USER ADMIN_1 cascade;
--創建表
CREATE TABLE UserInfo(
NAME Varchar2(40) NOT NULL,
sex VARCHAR2(1) DEFAULT 'Y'NOT NULL,
birthday DATE NOT NULL,
height Number(3,2),
weight NUMBER(3,2),
memo VARCHAR2(100)
);
--給列添加描述
COMMENT ON column userinfo.name IS '姓名';
COMMENT ON column userinfo.sex IS '性別';
COMMENT ON column userinfo.birthday IS '生日';
COMMENT ON column userinfo.height IS '身高';
COMMENT ON column userinfo.weight IS '體重';
COMMENT ON column userinfo.memo IS '備註';
--創建主鍵
alter TABLE userinfo ADD CONSTRAINT tb_test_p_name PRIMARY KEY (NAME);
--提交以上操作
COMMIT;
--創建表
CREATE TABLE student(
sid Varchar2(20) PRIMARY KEY NOT NULL,
sname varchar2(20) NOT NULL,
sbirth DATE,
sclass varchar2(20) NOT NULL,
saddress varchar2(100)
)TABLESPACE mydb;
CREATE TABLE department(
did Varchar2(20) PRIMARY KEY NOT NULL,
dname varchar2(40),
doffice VARCHAR2(100),
dtelphone varchar2(20),
dprincipal varchar2(20)
)TABLESPACE mydb;
CREATE TABLE CLASS(
cid Varchar2(20) PRIMARY KEY NOT NULL,
department varchar2(20),
cname VARCHAR2(20)
)TABLESPACE mydb;
--提交以上操作
COMMIT;
--插入測試數據:
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES('201005101','楊過',Date'1990-07-11','C001','湖南長沙');
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES('201005102','小龍女',Date'1992-05-11','C002','雲南大理');
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES('201005103','趙敏',Date'1995-04-01','C001','湖北武漢');
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES('201005104','李莫愁',Date'1950-11-21','C001','北京');
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES('201005105','段然',Date'1980-12-25','C002','四川成都');
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES('201005106','阿珠',Date'1970-07-10','C002','重慶');
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES('201005107','株珠',Date'1997-07-10','C003','廣東東莞');
INSERT INTO CLASS(cID,department,cname)VALUES('C001','d001','軟件一班');
INSERT INTO CLASS(cID,department,cname)VALUES('C002','d001','軟件二班');
INSERT INTO CLASS(cID,department,cname)VALUES('C003','d002','建築一班');
INSERT INTO department(did,dname,doffice,dtelphone,dprincipal)
VALUES('d001','計算機系','計算機樓','086-88764278','歐陽鋒');
INSERT INTO department(did,dname,doffice,dtelphone,dprincipal)
VALUES('d002','建築工程系','工程樓','086-88764285','黃華華');
--------------------------------Oracle第三章Oracle模式對象-----------------------------------
--查看錶(編輯表)
SELECT rowid ,student.* FROM student;
SELECT * FROM CLASS FOR UPDATE;
SELECT * FROM department;
--約束
ALTER TABLE class
ADD CONSTRAINT FK_department
FOREIGN KEY (department) REFERENCES department(did);
ALTER TABLE student
ADD CONSTRAINT FK_sclass
FOREIGN KEY (sclass) REFERENCES class(cid);
--查詢語句
SELECT student.SID,student.sname,student.sbirth,class.cname,department.dname FROM CLASS
INNER JOIN student ON class.cid=student.sclass
INNER JOIN department ON department.did=class.department;
--權限
GRANT CREATE VIEW,CREATE SEQUENCE,CREATE SYNONYM TO admin_1;
--創建視圖
CREATE VIEW view_student AS
SELECT * FROM student;
--查看視圖
SELECT * FROM VIEW_student
--刪除視圖
DROP VIEW VIEW_student
--創建索引
CREATE INDEX index_sname ON student(sname);
--查看索引
SELECT * FROM all_indexes;
--刪除索引
DROP INDEX index_sname;
--創建序列號
CREATE SEQUENCE seq_student
START WITH 1
INCREMENT BY 1
--添加序列號
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES(seq_student.nextval,'Tony',Date'1995-07-10','C001','廣東東莞');
--查看序列號
SELECT seq_student.nextval FROM dual;
--刪除序列號
DROP sequence seq_student
--同義詞
CREATE SYNONYM stu FOR mydb.studnet
--查看
SELECT * FROM stu;
--刪除
DROP SYNONYM stu;
--------------------------------Oracle第四章PL/SQL程序設計-----------------------------------
--聲明輸出
DECLARE
number1 INTEGER:=90;
BEGIN
dbms_output.put_line(number1);
END;
/*
--------PL/SQL塊-----------
聲明(DECLARE)
變量,遊標等
開始(BEGIN)
SQL語句或者PL/SQL語句
異常(EXCEPTION)
異常處理
結束(END)
*/
SELECT * FROM STUDENT;
DECLARE
NAME VARCHAR2(20);
BEGIN
SELECT sname INTO NAME FROM student WHERE SID='201005101';
dbms_output.put_line(NAME);
END;
--if-else條件控制
DECLARE
u1 NUMBER:=50;
u2 NUMBER:=50;
BEGIN
IF u1<u2 THEN
dbms_output.put_line('u1小於u2');
ELSIF u1>u2 then
dbms_output.put_line('u1大於u2');
ELSE
dbms_output.put_line('u1等於u2');
END IF;
END;
---case條件控制
BEGIN
CASE '&level'
WHEN 'A' THEN dbms_output.put_line('優秀');
WHEN 'B' THEN dbms_output.put_line('良好');
WHEN 'C' THEN dbms_output.put_line('一般');
WHEN 'D' THEN dbms_output.put_line('還需努力');
END CASE;
END;
--loop...exit...end loop循環控制
/*
loop
循環語句塊
if 條件 then
exit
end if;
end loop;
*/
DECLARE
number1 Integer:=50;
number2 INTEGER:=60;
i INTEGER:=0;
BEGIN
LOOP
number1:=number1+1;
IF number1=number2 THEN
EXIT;
END IF;
i:=i+1;
END loop;
dbms_output.put_line('共循環次數:'||to_char(i));
END;
--loop...exit...when...end loop循環
DECLARE
i NUMBER:=0;
BEGIN
LOOP
i:=i+1;
dbms_output.put_line('共循環次數:'||to_char(i));
EXIT WHEN i>10;
END LOOP;
END;
--for...in..loop..end循環控制
DECLARE
i NUMBER:=0;
BEGIN
FOR i IN 1..10 LOOP
dbms_output.put_line(to_char(i));
END LOOP;
END;
--while...loop..end loop
DECLARE
number1 Integer:=50;
number2 INTEGER:=60;
i INTEGER:=0;
BEGIN
WHILE number1<number2 LOOP
NUMBER1:=NUMBER1+1;
i:=i+1;
END loop;
dbms_output.put_line('共循環次數:'||to_char(i));
END;
/*
九九乘法表
*/
--if循環
DECLARE
i NUMBER:=1;
j NUMBER:=1;
BEGIN
FOR i IN 1..9 LOOP
FOR j IN 1..i LOOP
dbms_output.put(j||'*'||i||'='||i*j||' ');
END LOOP;
dbms_output.put_line('');
END LOOP;
END;
--goto語句
BEGIN
GOTO put;
dbms_output.put_line('這句話不會執行');
<<put>>
dbms_output.put_line('跳到這裏了');
END;
--exp01:
DECLARE
classname VARCHAR2(20);
BEGIN
SELECT cname INTO classname FROM student,CLASS WHERE student.sclass=class.cid AND SID='&stuid';
IF classname='軟件一班'THEN
dbms_output.put_line('發放獎金500');
ELSIF classname='軟件二班'THEN
dbms_output.put_line('發放獎金300');
ELSE
dbms_output.put_line('無獎金');
END IF;
END;
--exp02:
CREATE TABLE temp_table(
ID NUMBER,
NAME VARCHAR2(20)
);
DECLARE
i NUMBER:=1;
NAME VARCHAR2(20):='HelloWord';
BEGIN
FOR i IN 1..6 LOOP
INSERT INTO temp_table(ID,NAME) VALUES(i,NAME);
END LOOP;
END;
SELECT ROWID,temp_table.* FROM temp_table;
--預定義異常
DECLARE
sname VARCHAR2(20);
BEGIN
SELECT sname INTO sname FROM student;
EXCEPTION
WHEN TOO_MANY_ROWS THEN
dbms_output.put_line('出現返回了多行的異常');
END;
--自定義異常
DECLARE
--定義異常
not_in EXCEPTION;
city VARCHAR2(20);
BEGIN
city := '&name';
IF city NOT IN('長沙','常德','北京') THEN
RAISE not_in;
END IF;
EXCEPTION
WHEN not_in THEN
dbms_output.put_line('輸入的地名不正確!');
end;
--------------------------------Oracle第五章遊標------------------------------------
select * from student;
-------------------------------隱式遊標-------------------------------------
--%found遊標:DML語句影響一行或者多行是,%found屬性返回true
begin
update student set sid='201005108'where sid='1';
if sql%found then
dbms_output.put_line('存在記錄');
else
dbms_output.put_line('不存在記錄');
end if;
end;
--%notfound遊標:與%found遊標作用相反
begin
delete from student where sid='1';
if sql%notfound then
dbms_output.put_line('刪除失敗');
end if;
end;
--%rowcount遊標:返回DML語句執行的行數
begin
update student set sid='201005109'where sid='2';
if sql%rowcount=0 then
dbms_output.put_line('沒有查詢到數據');
else
dbms_output.put_line('查詢到'||sql%rowcount||'條數據');
end if;
end;
--Cursor for loop遊標遍歷查詢結果集
begin
for s in(select sid,sname,saddress from student)
loop
dbms_output.put('學生編號'||s.sid||' ');
dbms_output.put('學生姓名'||s. sname||' ');
dbms_output.put_line('學生住址'||s.saddress);
end loop;
end;
--------------------------自定義顯示遊標------------------------------------
declare
cursor cur_class is
select * from class ;
cid varchar2(20);
department varchar2(20);
cname varchar2(20);
begin
open cur_class;
loop
fetch cur_class into cid,department,cname; --從遊標中提取數據
exit when cur_class%notfound;
dbms_output.put('科目編號'||cid||' ');
dbms_output.put('教師編號'||department||' ');
dbms_output.put_line('住址'||cname);
end loop;
close cur_class;
end;
-----------顯示遊標帶參(參數不能帶長度)--------------
declare
cursor cur_class(id class.cid%type) is
select * from class where cid=id ;
crow class%rowtype; --行類型
id class.cid%type;
begin
id := '&id';
open cur_class(id);
loop
fetch cur_class into crow ; --從遊標中提取數據
exit when cur_class%notfound;
dbms_output.put('科目編號'||crow.cid||' ');
dbms_output.put('教師編號'||crow.department||' ');
dbms_output.put_line('住址'||crow.cname);
end loop;
close cur_class;
end;
--遊標for循環
declare
cursor cur_student is
select * from student;
begin
for s in cur_student
loop
dbms_output.put('學生編號'||s.sid||' ');
dbms_output.put('學生姓名'||s.sname||' ');
dbms_output.put_line('學生住址'||s.saddress);
end loop;
end;
--遊標for循環的上機練習2
begin
for showclass_cur in (select * from class) loop
dbms_output.put_line('班級名:'||showclass_cur.cid);
for showstu_cur in (select * from student where sclass=showclass_cur.cid) loop
dbms_output.put_line('學生名:'||showstu_cur.sname);
end loop;
end loop;
end;
----------------遊標變量--------------------
declare
--聲明遊標類型
type stu_cur is ref cursor return student%rowtype;
--聲明遊標變量
stu_cur_type stu_cur ;
--聲明接收結果集變量
sturow student%rowtype;
begin
--打開遊標
open stu_cur_type for select * from student;
loop
fetch stu_cur_type into sturow;--接收stu_cur_type遊標變量中的結果集
exit when stu_cur_type%notfound;
dbms_output.put('學生編號'||sturow.sid||' ');
dbms_output.put('學生姓名'||sturow.sname||' ');
dbms_output.put_line('學生住址'||sturow.saddress);
end loop;
--關閉遊標
close stu_cur_type;
end;
------------第六章存儲過程---------------
select * from student;
--聲明無參proc
create procedure showstudent as
begin
for student_cur in (select * from student)
loop
dbms_output.put('學號:'||student_cur.sid||' ');
dbms_output.put('姓名:'||student_cur.sname||' ');
dbms_output.put_line('住址:'||student_cur.saddress);
end loop;
end showstudent;
--調用proc
begin
showstudent;
--exec showstudent;
end;
--查看存儲過程
select text from user_source where name = 'SHOWSTUDENT';
--刪除proc
drop procedure showstudent;
--聲明有參proc(in,out參數類型)
create or replace procedure GetStuInfo(id in varchar2,sname out varchar2,cname out varchar2) is
begin
select s.sname,c.cname into sname,cname from
student s join class c on s.sclass=c.cid where s.sid=id;
exception
--no_data_found異常是在找不到一條記錄時報錯
--dup_val_on_index唯一索引重複報錯
when no_data_found then
dbms_output.put_line('該學生信息不存在!');
commit;
end GetStuInfo;
--調用proc
declare
stuname varchar2(20);
calssname varchar2(20);
begin
GetStuInfo('201005106',stuname,calssname);
dbms_output.put('學生姓名:'||stuname||' ');
dbms_output.put_line('班級名稱:'||calssname||' ');
end;
--聲明有參proc(in out參數類型)
--給電話號碼增加區碼
create or replace procedure add_region(tel_num in out varchar2)
as
begin
tel_num := '0735-'||tel_num;
end add_region;
--調用add_region存儲過程
declare
phone varchar2(15):='84541542';
begin
add_region(phone);
dbms_output.put_line('新電話號碼爲:'||phone);
end;
--存儲函數
create or replace function getsnamebyid(id varchar2)
return varchar2 --聲明返回值類型
as
name varchar2(20);--接收值的變量
begin
select sname into name from student where sid=id;
return(name); --返回值
exception
when no_data_found then
dbms_output.put_line('沒有數據');
return(null);
when others then
dbms_output.put_line('發生其他錯誤');
return(null);
end;
--調用函數
begin
dbms_output.put_line(getsnamebyid('201005101'));
end;
select * from student;
select * from class;
--計算當前的年份差select語句
select floor(to_number(sysdate-to_date(student.sbirth))/365) from student;
--自定義計算當前的年份差timepoor函數
create or replace function time_poor (years in varchar2) return varchar2
as
timepoor varchar2(20);
begin
select floor(to_number(sysdate-to_date(years,'yyyy-mm-dd'))/365) into timepoor from dual;
return(timepoor);
end;
--調用function
begin
if time_poor('1998-01-05')>=18 then
dbms_output.put_line('成年!');
else
dbms_output.put_line('未成年!');
end if;
--dbms_output.put_line('時間差爲:'||time_poor('2001-01-05'));
end;
------------------程序包--------------------
create or replace package stuInfo is --聲明包頭
function getclassname(id varchar2) return varchar2; ---根據班級號獲得班級名稱函數
procedure showstu; ---獲得學生信息列表proc
end;
create or replace package body stuInfo --包體部分
as
---根據班級號獲得班級名稱函數--
function getclassname(id varchar2)
return varchar2
is
classname varchar2(20);
begin
select cname into classname from class where cid=id;
return(classname);
exception
when no_data_found then
dbms_output.put_line('沒有數據');
return(null);
when others then
dbms_output.put_line('發生其他錯誤');
return(null);
end;
---獲得學生信息列表proc--
procedure showstu
is
begin
for stu in (select * from student) loop
dbms_output.put('學生編號爲:'||stu.sid||' ');
dbms_output.put('學生姓名爲:'||stu.sname||' ');
dbms_output.put_line('學生住址爲:'||stu.saddress||' ');
end loop;
end showstu;
end stuInfo;
--刪除程序包
drop package stuinfo;
--調用程序包
begin
dbms_output.put_line('班級名稱爲:'||stuinfo.getclassname('C005'));
dbms_output.put_line('----------------------------------');
dbms_output.put_line('----學生列表----');
stuInfo.showstu;
end;
------------------------第七章觸發器-------------------------
-----------------------表操作----------------------
create table temp(
Del_name varchar2(20),
Del_time date
)TABLESPACE mydb;
--新增字段 [alter table 表名 add 字段名 字段類型;]
alter table temp add v_type varchar2(15);
--修改字段名 [alter table 表名 rename column 原字段名 to 新字段名;]
alter table temp rename column V_TYPE to t_type;
--刪除字段 [alter table 表名 drop column 字段名;]
alter table temp drop column t_type;
--修改表名
alter table temp rename .........
to recordtable;
--語句級觸發器(未使用for each now):不管DML語句影響多少行 也只調用一次觸發器
--創建多條件觸發器(當刪除學員以後觸發插入語句 插入數據到recordtable表中)
create or replace trigger t_student_trigger
after --觸發時機
delete or update or insert --觸發事件
on student --觸發目標
begin
if deleting then
insert into recordtable values(user,sysdate,'delete'); --觸發操作
elsif updating then
insert into recordtable values(user,sysdate,'update'); --觸發操作
elsif inserting then
insert into recordtable values(user,sysdate,'insert'); --觸發操作
end if;
end;
--刪除student表中數據
delete from student where sid='201005108';
--插入student數據
INSERT INTO student(SID,sname,sbirth,sclass,saddress)
VALUES('201005108','Tong',Date'1991-07-10','C002','美國紐約');
--更改student表中數據
update student set sname='李逍遙' where sid='201005107';
--查詢recordtable表
select * from recordtable for update;
--行級觸發器(使用for each now):DML語句影響多少行數據的時候 對其中的每行數據都會調用觸發器
--[標識符:new和:old]
create or replace trigger t_student_trig
after delete on student
for each row --行內觸發器標誌
when(old.sid = '201005108') --條件標識符不能加冒號
begin
insert into recordtable values(:old.sid,sysdate,'delete_row'); --觸發操作
end;
--測試行級觸發器
delete from student where sid > '201005106';
--instead of觸發器(基於多表視圖是無法進行insert,update,delete操作)
--創建學生學分視圖
create or replace view stu_cla_view as
select sname,cname,cps,sclass
from class,student
where class.cid=student.sclass;
--查看視圖
select * from user_updatable_columns
where table_name=upper('stu_cla_view');
select * from stu_cla_view;
--測試是否能更新視圖
update stu_cla_view set cname='軟件二班' where sclass='C002';
-- delete from stu_cla_view where cname='經管一班';
select * from student;
select * from class;
--更新視圖trig
create or replace trigger update_view
instead of update
on stu_cla_view
for each row
begin
update class
set cname=:new.cname
where cid=:new.sclass;
end;
--系統事件觸發
--數據庫關閉時記錄的關閉時間
create or replace trigger db_close_trig
before shutdown
on database
begin
dbms_output.put_line('系統於'||sysdate||'關閉');
end;
--用戶事件觸發器:DDL語句或者用戶註冊登錄等事件的時候觸發
create table user_log(
username varchar2(20),
log_date timestamp,
l_type varchar2(20)
)
--創建觸發器
--登錄觸發器
create or replace trigger logon_trig
after logon on schema
begin
insert into user_log values(user,sysdate,'Logon');
end;
--註銷
create or replace trigger logff_trig
before logoff on schema
begin
insert into user_log values(user,sysdate,'logoff');
end;
--測試用戶事件觸發器
select * from user_log;
--查看觸發器
select trigger_name,trigger_type,triggering_event from user_triggers
where trigger_name=upper('T_STUDENT_TRIG');
---------------------使用觸發器和序列自動增長-----------------------
create table test(
id number primary key,
name varchar2(20)
)
--創建序列號
create sequence seq_test_id
start with 1
increment by 1
--創建觸發器
create or replace trigger test_trig
before insert
on test
for each row
declare
next_id number; --接收序列號變量
begin
select seq_test_id.nextval into next_id from dual;
:new.id := next_id;
end test_trig;
select * from test;
--測試
insert into test
(name)
values
('Pater');
-----------------第八章數據庫備份與恢復--------------------
select name,created,log_mode from V$database;
select * from test;
Oracle基本語法及例子
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