SQL语句PART11
1. My test: (create and grant the sysdba to a new user by SQL*Plus)
CREATE USER FJTEST1 IDENTIFIED BY JEANJEANFANG;
GRANT SYSDBA TO FJTEST;
REVOKE SYSDBA from FJTEST;
CONNECT FJTEST1/JEANJEANFANG AS SYSDBA;
2. Using ORAPWD in windows:
C:\» ORAPWD;
(show help information)
3. to see the password file:
Grammer: ORACLE_BASE\ORACLE_HOME\database» attrib
F:\oracle\ora92\database\attrib
** if want to create a user that can be connect as normal and can create table, you should grant “create session”, “resource” privileges to the user or it cannot connect as normal.
e.g.:
SQL»create user fj identified by fj;
SQL»grant create session to fj;
SQL»grant resource to fj;
Then the user “fj” can be connected as “normal” and the schema belonging to this user will be created, where he/she can create tables.
SQL» select * from user_sys_privs;
Use above statements to check user’s own system privileges.
2．How to create password file using ORAPWD
F:\oracle\ora92\database\ORAPWD FILE=F:\oracle=ora92\database\PWDmydb.ora PASSWORD=oracle ENTRIES=30
F:\oracle\ora92\database\sqlplus /nolog
SQL» connect SYS/oracle AS SYSDBA
ERROR: ORA-01031: insufficient privileges
(如果发生以上错误, 说明在ORACLE中开启了多于一个的数据库, 并且处于ＳＴＡＲＴＵＰ状态．此时要连接必须用: connect SYS/oracle＠SID AS SYSDBA, 必须在F:\oracle\ora92\network\admin＼ＴＮＳＮＡＭＥＳ．ＯＲＡ里面定义过， 如果连接的是个别数据库，就不会报告这样的错误)
ＴＮＳＮＡＭＥＳ．ＯＲＡ 定义方式：
FJDB.SIIC.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = fangjin)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = fjdb)
)
)
** or use the following command in dos state:
C: \ set oracle_sid = “jeandb”
C:\ sqlplus /nolog
SQL» connect sys/jeandb as sysdba;
3. Ｈow to create an oracle database in windows manually
Step1: setting environment var
相关文档：
第一题：
为管理业务培训信息，建立3个表：
S(S#,SN,SD,SA)S#,SN,SD,SA分别代表学号，学员姓名，所属单位，学员年龄
C(C#,CN)C#,CN分别代表课程编号，课程名称
SC(S#,C#,G) S#,C#,G分别代表学号，所选的课程编号，学习成绩
(1)使用标准SQL嵌套语句查询选修课程名称为’税收基础’的学员学号和姓名?
(2) ......
4、对象依赖性
CREATE OR REPLACE TYPE Obj1 AS OBJECT (
f1 NUMBER,
f2 VARCHAR2(10),
f3 DATE
);
/
CREATE OR REPLACE TYPE Obj2 AS OBJECT (
f1 DATE,
f2 CHAR(1)
);
/
CREATE OR REPLACE TYPE Obj3 AS OBJECT (
a Obj1,
b Obj2
);
/
OBJ3依赖于OBJ ......
--1加内存表
EXEC sp_tableoption '表名','pintable', 'true'
--2卸载内存表
EXEC sp_tableoption '表名','pintable', 'false'
--2查询是否有内存表驻留
SELECT * from INFORMATION_SCHEMA.Tables
WHERE TABLE_TYPE = 'BASE TABLE'
AND OBJECTPROP ......
constraint Example:
1. grammer:
create table [schema.]table
(column datatype [DEFAULT expr]
[column_constraint], ...
[table_constraint] [,......]);
2. example of a column_level constraint:
create table empl ......
