How to check which libraries are available in oracle

Oracle method to view the library: 1. Use SQLPlus, which can be used to execute SQL statements and will return a list of all users, each user corresponding to a library; 2. Use Oracle SQL developer tools, free integration Development environment, which can be used to write, execute and debug SQL statements. In the "Other Users" section of the navigation panel, you can see a list of all users; 3. Use OE to monitor and manage Oracle databases; 4. Use Oracle data Dictionary view, used to query metadata information of the database.

The operating environment of this tutorial: Windows 10 system, Oracle version 19c, DELL G3 computer.

Oracle is a relational database management system that allows users to create, manage and operate databases. In Oracle, a library (also called a schema) is a logical container used to store related tables, views, indexes, and other database objects.

To see which libraries exist in Oracle, you can use the following method:

Use SQLPlus: SQLPlus is a command line tool provided by Oracle that can be used to execute SQL statements. By connecting to an Oracle database, you can view the list of libraries using the following query:

SELECT username FROM all_users;

This will return a list of all users, one library for each user. Among them, all_users is an Oracle system view, which contains information about all users.

Use Oracle SQL Developer Tools: Oracle SQL Developer is a free integrated development environment provided by Oracle that can be used to write, execute and debug SQL statements. By connecting to the Oracle database, in the "Other Users" section of the navigation panel, you can see a list of all users (libraries).

Using Oracle Enterprise Manager: Oracle Enterprise Manager (EM for short) is a web-based management tool used to monitor and manage Oracle databases. By logging into EM, you can navigate to the Databases section and select the Libraries tab to view a list of all libraries.

Using Oracle data dictionary views: Oracle provides a series of data dictionary views for querying database metadata information. You can view a list of all libraries by executing the following query:

SELECT DISTINCT owner FROM all_objects;

This will return the owners of all objects, one for each library. Among them, all_objects is an Oracle system view, which contains information about all objects.

No matter which method is used, you can view all libraries present in Oracle. These methods can be chosen based on the user's needs and the tools used.

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