oracle query library name

In the Oracle database, querying the database name can be achieved through the following methods:

1. Use the SELECT statement to query the database name

Use the SELECT statement to query the database Name is the most commonly used method. In the Oracle database, there is a special table called V$DATABASE, which contains information about the current database instance, including the database name. The following is the basic statement to query the database name:

SELECT name FROM v$database;

After executing the above statement, the name of the current database instance will be returned.

2. Use the SQL*Plus command to query the database name

SQLPlus is the most commonly used interactive command line tool in the Oracle database and can be used to query the database various information. In SQLPlus, you can use the following command to query the database name:

SQL> SHOW DATABASE;

3. View the database configuration file

In the installation directory of the Oracle database, there is a file called init.ora file, which contains various configuration information of the database, including the database name. You can check the database name in the init.ora file through the following steps:

1) Find the directory where the init.ora file is located, usually in the $ORACLE_HOME/dbs directory.

2) Open the init.ora file and look for the db_name parameter in it, which is the database name.

4. View the database control file

In the Oracle database, the control file is one of the files that maintains database structure information and also contains the database name. You can view the database name in the control file through the following steps:

1) Log in to the database and execute the following command:

SQL> SELECT name FROM v$controlfile;

2) After executing the above statement, the path and name of the control file will be returned. information, where the NAME column is the database name.

Summary

Through the above methods, you can quickly and easily query the database name of the Oracle database. Among them, querying using the SELECT statement is the most commonly used method and the simplest method. In actual work, various methods need to be flexibly used to adapt to different needs and operating environments.

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