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：
问题：假设有张学生成绩表(tb)如下:
姓名 课程 分数
张三 语文 74
张三 数学 83
张三 物理 93
李四 语文 74
李四 数学 84
李四 物理 94
想变成(得到如下结果)：
姓名 语文 数学 物理
---- ---- --- ......
第十一题：
有表students(name,class,grade),请用标准sql语句完成
name class grade
张三 数学 81
李四 语文 70
王五 数学 90
张三 语文 60
李四 数学 100
王五 语文 90
王五 英语 81
要求: 用sql语句输出各门功课都大于80分的同学姓名?
create table students (
name varchar(25),
class varchar(25),
grad ......
第二十题：
怎么样抽取重复记录
表：
id name
--------
1 test1
2 test2
3 test3
4 test4
5 test5
6 test6
2 test2
3 test3
2 test2
6 test6
查出所有有重复记录的数据，用一句sql 来实现
create table D(
id varchar (20),
name varchar (20)
)
insert into D values('1','test1')
insert into D v ......
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 ......
