Oracle经典建表语句【scott建表】

Oracle经典建表语句【scott建表】
==========================================
create table EMP
(
EMPNO NUMBER(4) PRIMARY KEY,
ENAME VARCHAR2(10),
JOB VARCHAR2(9),
MGR NUMBER(4),
HIREDATE DATE,
SAL NUMBER(7,2),
COMM NUMBER(7,2),
DEPNO NUMBER(4)
);

CREATE TABLE Dept(
DEPTNO NUMBER(4),
DNAME VARCHAR2(14),
LOC VARCHAR2(13)
);

CREATE TABLE Salgrade
(
GRADE NUMBER,
LOSAL NUMBER,
HISAL NUMBER
);

CREATE TABLE Bonus
(
ENAME VARCHAR(10),
JOB VARCHAR2(9),
SAL NUMBER,
COMM NUMBER
);

INSERT INTO Dept VALUES (10,'财务处','纽约');
INSERT INTO Dept VALUES (20,'发展部','达拉斯');
INSERT INTO Dept VALUES (30,'销售部','芝加哥');
INSERT INTO Dept VALUES (40,'市场开拓部','波士顿');
SELECT * FROM DEPT;

INSERT INTO EMP VALUES
(7369,'史密斯','秘书',7902,to_date('17-12-1980','dd-mm-yyyy'),800,null,20);
INSERT INTO EMP VALUES
(7499,'艾伦','销售员',7698,to_date('20-2-1981','dd-mm-yyyy'),1600,300,30);
INSERT INTO EMP VALUES
(7521,'沃尔德','销售员',7698,to_date('22-2-1981','dd-mm-yyyy'),1250,500,30);
INSERT INTO EMP VALUES
(7566,'琼斯','经理',7839,to_date('2-4-1981','dd-mm-yyyy'),2975,NULL,20);
INSERT INTO EMP VALUES
(7654,'马丁','销售员',7698,to_date('28-9-1981','dd-mm-yyyy'),1250,1400,30);
INSERT INTO EMP VALUES
(7698,'布莱克','经理',7839,to_date('1-5-1981','dd-mm-yyyy'),2850,NULL,30);
INSERT INTO EMP VALUES
(7782,'克拉克','总经理',7839,to_date('9-6-1981','dd-mm-yyyy'),2450,NULL,10);
INSERT INTO EMP VALUES
(7839,'金','主席',NULL,to_date('17-11-1981','dd-mm-yyyy'),5000,NULL,10);
INSERT INTO EMP VALUES
(7844,'唐纳','销售员',7698,to_date('8-9-1981','dd-mm-yyyy'),1500,0,30);
INSERT INTO EMP VALUES
(7900,'詹姆斯','秘书',7698,to_date('3-12-1981','dd-mm-yyyy'),950,NULL,30);
INSERT INTO EMP VALUES
(7902,'福尔德','分析师',7566,to_date('3-12-1981','dd-mm-yyyy'),3000,NULL,20);
INSERT INTO EMP VALUES
(7934,'米勒','秘书',7782,to_date('23-1-1982','dd-mm-yyyy'),1300,NULL,10);
select * from emp;

INSERT INTO SALGRADE VALUES (1,700,1200);
INSERT INTO SALGRADE VALUES (2,1201,1400);
INSERT INTO SALGRADE VALUES (3,1401,2000);
INSERT INTO SALGRADE VALUES (4,2001,3000);
INSERT INTO SALGRADE VALUES (5,3001,9999);
select * from salgrade;

commit;

==========================================
--外键约束
CREATE TABLE QQ(
GARDE NUMBER(3) PRIMARY KEY,
GNAME VARCHAR2(20)
);
CREATE TABLE FIREND(
FID NUMBER(3),
NAME VARCHAR2(20),
GRADE NUMBER(3),
FOREIGN KEY(GRADE) REFERENCES QQ(GARDE) ON DELETE CASCADE
);

创表时创建外键:
FOREIGN KEY(列名) REFERENCES 引用外键表名(列名) ON DELETE CASCADE

创表后添加外键:
alter TABLE 表名 ADD constraint 外键约束名 FOREIGN KEY(列名) REFERENCES 引用外键表(列名)
ON UPDATE RESTRICT //同步更新
ON DELETE RESTRICT // 同步删除;
==========================================
oracle实现主键id自增

-- 创建表
CREATE TABLE t_module (
module_id INT NOT NULL ,
module_code varchar(32) NOT NULL,
module_name varchar(32) NOT NULL,
isnew INT DEFAULT 0 ,
PRIMARY KEY (module_id)
)
-- 为表创建序列
-- 从1 开始, 每次加1
CREATE SEQUENCE SEQ_MODULE START WITH 1 INCREMENT BY 1;
--查询下一个 id
select seq_module.nextval from dual
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来源：oschina

链接：https://my.oschina.net/u/210883/blog/3071608

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