oracle tnsping命令
1、测试数据库服务的命令:
控制台 tnsping命令 IP地址 端口号
数据库服务名称
cmd->tnsping
192.168.1.123:1521/oracle10g
tnsping命令:如果能够ping通,则说明客户端能解析listener的机器名,而且lister也已经启动,但是并不能说明数据库已经打开,而且tsnping的过程与真正客户端连接的过程也不一致。但是如果不能用tnsping通,则肯定连接不到数据库。
2、查看服务配置的ora文件路径
E:\database\oracle\user\product\11.1.0\db_1\NETWORK\ADMIN\tnsnames.ora
文件内容形如:
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)
(HOST = 192.168.1.123)
(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
3、使用sql*plus查询数据库
b、查询所有的表空间:select * from v$tablespace;
TS#
NAME
INC BIG FLA E
---------- ------------------------------ --- --- --- -
0
SYSTEM
YES NO YES
1
UNDOTBS1
YES NO YES
2
SYSAUX
YES NO YES
4
USERS
YES NO YES
3
TEMP
NO NO
YES
c、查询默认的表空间:
SQL> col property_name for a10
SQL> col property_value for a10
SQL> col descrpition for a10
SQL> select * from database_propertie where
property_name='DEFULT_PERMANENT_TABLESPACE';
d、查询所有用户:
select * from dba_users;
e、查询符合某些条件的用户:
select * from dba_users where username like 'ABC%';
注:sql*plus中的条件参数有大小写的区分,
例如“where property_name='DEFULT_PERMANENT_TABLESPACE';”和“username like 'ABC%'”,需要与数据库中的一致。
转自:http://jerry-chen.iteye.com/blog/1028530
OCP试题
Your tnsnames.ora file has the following entry for the service alias ORCL:
ORCL =
( DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.156.24.216)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl.oracle.com)
)
)
The TNSPING command executes successfully when tested with ORCL but you are not able to connect
to the database instance with the following command:
SQL> CONNECT scott/tiger@orcl
What could be the reason for this?
A. The listener is not running at the server.
B. The TNS_ADMIN environmental variable is set to a wrong value.
C. The orcl.oracle.com database service is not registered with the listener.
D. The DEFAULT_DOMAIN parameter is set to a wrong value in the SQLNET.ORA file.
Answer: C
1、测试数据库服务的命令:
tnsping命令:如果能够ping通,则说明客户端能解析listener的机器名,而且lister也已经启动,但是并不能说明数据库已经打开,而且tsnping的过程与真正客户端连接的过程也不一致。但是如果不能用tnsping通,则肯定连接不到数据库。
2、查看服务配置的ora文件路径
3、使用sql*plus查询数据库
注:sql*plus中的条件参数有大小写的区分,
例如“where property_name='DEFULT_PERMANENT_TABLESPACE';”和“username like 'ABC%'”,需要与数据库中的一致。
转自:http://jerry-chen.iteye.com/blog/1028530
OCP试题
ORCL
(
(ADDRESS
(CONNECT_DATA
(SERVER
(SERVICE_NAME
)
)
The
to
SQL>
What
A.
B.
C.
D.
Answer: