Brief description of Oracle structure:
Install Oracle> Create Database> Create mode or schema> Create Table> table
There is no problem in installing Oracle-"to create a database. But how to create a solution is the corresponding solution items under the solution in the OEM? It is mainly to create a user user1, configure the network name, that is, the network connection, and then use the PL/SQL tool to connect to it. Find the table item and add the table. When adding the table, note that this table belongs to this user user1. In this way, the solution user1. It also describes the statement that a user corresponds to a mode.
Classification from the storage perspective:
Storage space: Tables and Indexes
Views, synonyms, sequences, stored procedures, and triggers that do not occupy actual storage space
Cluster: it is only an optional storage method to save space.
1. When installing Oracle, an error is reported: An error occurred while loading the database: areasqueries
Stop installing all products
Only stop installing this component
Solution: There are two reasons: first, the original installation file contains Chinese characters, and second, the installation target directory contains Chinese characters, which can be changed to valid English characters.
2. Oracle Network Configuration:
Server configuration is required. If the client is on the local machine, no client is required. You can use con user/pwd to directly access the server. Otherwise, you must configure the client and the service name SERVICE_NAME (a service name corresponding to the server ), use con user/pwd @ SERVICE_NAME to access the service.
1>. SERVER: use the network assistant netconfigurationassistant. Or modify listener. ora in the Listener Configuration File % ORACLE_HOME %/ora92/Network/admin. Configure protocal, host, port. eg:
2>. Client: Use a network assistant. Or modify tnsnames. ora in the Listener Configuration File % ORACLE_HOME %/ora92/Network/admin. Configure protocal, host, port, and SERVICE_NAME (Service name of the server, which is generally the database name. As Sid here)
Eg: test_1 service: test_1 =
(Description =
(Address_list =
(Address = (Protocol = TCP) (host = 192.168.199.122) (Port = 1521 ))
)
(CONNECT_DATA =
(SID = test)
(Server = dedicated)
)
)