学习ORACLE之创建实验数据篇

1. Create user

create user guest identified by Welcome1;

查看用户是否创建成功：

select username from all_users; 

或者
select username from dba_users; 

用guest/Welcome1登陆DB
conn guest/Welcome1

会遇到Error ORA-01005: null password given; logon denied。 解决方法:

(1)sqlplus system/oracle as sysdba

(2)grant create session to guest;

通过以下方式查询当前用户的权限

查角色权限

select * from user_role_privs

查对象权限

select * from user_tab_privs

查系统权限

select * from user_sys_privs

如果已经创建的用户，忘记密码后，多次重试导致用户被锁住啦，会出现错误ORA-28000: the account is locked，解决方法：

 alter user scott account unlock;

2.创建数据

执行如下sql语句所在的文件：/scratch/weiywang/scripts/sql/demo_scott.sql

SQL>@/scratch/weiywang/scripts/sql/demo_scott.sql

检查数据表格是否创建成功：

SELECT table_name FROM USER_TABLES;

TABLE_NAME
------------------------------
EMP
DEPT
BONUS
SALGRADE
DUMMY

SET TERMOUT ON 
PROMPT Building demonstration tables. Please wait. 
SET TERMOUT OFF
DROP TABLE EMP; 
DROP TABLE DEPT; 
DROP TABLE BONUS; 
DROP TABLE SALGRADE; 
DROP TABLE DUMMY;
CREATE TABLE EMP 
(EMPNO NUMBER(4) NOT NULL, 
ENAME VARCHAR2(10), 
JOB VARCHAR2(9), 
MGR NUMBER(4), 
HIREDATE DATE, 
SAL NUMBER(7, 2), 
COMM NUMBER(7, 2), 
DEPTNO NUMBER(2));
INSERT INTO EMP VALUES 
(7369, 'SMITH', 'CLERK', 7902, 
TO_DATE('17-DEC-1980', 'DD-MON-YYYY'), 800, NULL, 20); 
INSERT INTO EMP VALUES 
(7499, 'ALLEN', 'SALESMAN', 7698, 
TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 1600, 300, 30); 
INSERT INTO EMP VALUES 
(7521, 'WARD', 'SALESMAN', 7698, 
TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 1250, 500, 30); 
INSERT INTO EMP VALUES 
(7566, 'JONES', 'MANAGER', 7839, 
TO_DATE('2-APR-1981', 'DD-MON-YYYY'), 2975, NULL, 20); 
INSERT INTO EMP VALUES 
(7654, 'MARTIN', 'SALESMAN', 7698, 
TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250, 1400, 30); 
INSERT INTO EMP VALUES 
(7698, 'BLAKE', 'MANAGER', 7839, 
TO_DATE('1-MAY-1981', 'DD-MON-YYYY'), 2850, NULL, 30); 
INSERT INTO EMP VALUES 
(7782, 'CLARK', 'MANAGER', 7839, 
TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10); 
INSERT INTO EMP VALUES 
(7788, 'SCOTT', 'ANALYST', 7566, 
TO_DATE('09-DEC-1982', 'DD-MON-YYYY'), 3000, NULL, 20); 
INSERT INTO EMP VALUES 
(7839, 'KING', 'PRESIDENT', NULL, 
TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10); 
INSERT INTO EMP VALUES 
(7844, 'TURNER', 'SALESMAN', 7698, 
TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500, 0, 30); 
INSERT INTO EMP VALUES 
(7876, 'ADAMS', 'CLERK', 7788, 
TO_DATE('12-JAN-1983', 'DD-MON-YYYY'), 1100, NULL, 20); 
INSERT INTO EMP VALUES 
(7900, 'JAMES', 'CLERK', 7698, 
TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 950, NULL, 30); 
INSERT INTO EMP VALUES 
(7902, 'FORD', 'ANALYST', 7566, 
TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 3000, NULL, 20); 
INSERT INTO EMP VALUES 
(7934, 'MILLER', 'CLERK', 7782, 
TO_DATE('23-JAN-1982', 'DD-MON-YYYY'), 1300, NULL, 10);
CREATE TABLE DEPT 
(DEPTNO NUMBER(2), 
DNAME VARCHAR2(14), 
LOC VARCHAR2(13) );
INSERT INTO DEPT VALUES (10, 'ACCOUNTING', 'NEW YORK'); 
INSERT INTO DEPT VALUES (20, 'RESEARCH', 'DALLAS'); 
INSERT INTO DEPT VALUES (30, 'SALES', 'CHICAGO'); 
INSERT INTO DEPT VALUES (40, 'OPERATIONS', 'BOSTON');
CREATE TABLE BONUS 
(ENAME VARCHAR2(10), 
JOB VARCHAR2(9), 
SAL NUMBER, 
COMM NUMBER);
CREATE TABLE SALGRADE 
(GRADE NUMBER, 
LOSAL NUMBER, 
HISAL NUMBER);
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);
CREATE TABLE DUMMY 
(DUMMY NUMBER);
INSERT INTO DUMMY VALUES (0);
COMMIT;
SET TERMOUT ON 
PROMPT Demonstration table build is complete.
EXIT