How to Check the Indexes on a Table in Oracle?

Oracle Database is the world’s most popular and powerful relational database that can store and retrieve huge amounts of data efficiently. It provides many features to make data retrieval easy, one of them is indexing functionality, which quickly searches and retrieves data from tables. However, it is important to regularly check and manage indexes to ensure the effective and optimized performance of the database.

This guide will explain how to check the indexes on a table in the Oracle database.

How to Check the Indexes on a Table in Oracle Database?

To check indexes on a table in Oracle, the following views and commands can be used:

ALL_INDEXES
USER_IND_COLUMNS
USER_INDEXES
DBA_INDEXES
USER_OBJECTS
DESCRIBE

How to Check Indexes on a Table in Oracle Using ALL_INDEXES?

The “ALL_INDEXES” view is used to get the information of all indexes accessible to the current user, including tables. To check the indexes on a table in the Oracle database, “ALL_INDEXES” can be used. The example is given below:

SELECT * FROM ALL_INDEXES WHERE TABLE_NAME = 'XDB$XTAB';

In the above command, “XDB$XTAB” is a table name specified in a TABLE_NAME clause.

Output

The output showed all indexes of table “XDB$XTAB”.

How to Check Indexes on a Table in Oracle Using USER_IND_COLUMNS?

The “USER_IND_COLUMNS” retrieves the information about the columns in the indexes of the current user. When using “USER_IND_COLUMNS” in Oracle, specify the table name as given below:

SELECT * FROM USER_IND_COLUMNS WHERE TABLE_NAME = 'INVENTORIES';

In the above command, “INVENTORIES” is the table name.

Output

The output shows the information about the columns in the indexes.

How to Check Indexes on a Table in Oracle Database Using USER_INDEXES?

The “USER_INDEXES” view is used to get information about the indexes of the current user. The table name can be specified with USER_INDEXES to check the indexes on a table in Oracle. The example is given below:

SELECT * FROM USER_INDEXES WHERE TABLE_NAME = 'COUNTRIES';

In the above command, “COUNTRIES” is the table name.

Output

The output showed the information about the indexes of a specified table.

How to Check Indexes on a Table in Oracle Database Using DBA_INDEXES?

The “DBA_INDEXES” is used to get information about all indexes in the entire database, including indexes of other users. To check indexes on a table in the Oracle database, the “DBA_INDEXES” can be used along with “TABLE_NAME” to specify the table name. The example is given below:

SELECT * FROM DBA_INDEXES WHERE TABLE_NAME = 'ADO_IMPARAM$';

In the above example, “ADO_IMPARAM$” is the table name.

Output

The output showed the information about all indexes of a specific table.

How to Check Indexes on a Table in Oracle Database Using USER_OBJECTS?

The “USER_OBJECTS” gets information about all objects owned by the current user, including tables, views, indexes, and much more. To check indexes on a table in Oracle using USER_OBJECTS type the following command and specify the table object:

SELECT * FROM USER_OBJECTS WHERE OBJECT_TYPE = 'TABLE';

In the above command, “TABLE” is the object type.

Output

In the output, you can see information about all objects of a current user.

Conclusion

To check indexes on a table in Oracle different commands can be used, such as ALL_INDEXES, USER_IND_COLUMNS, USER_INDEXES, DBA_INDEXES, and USER_OBJECTS. All these commands are used to get different types of information. This guide explained all these commands with examples to check the indexes on a table in Oracle.

How to Check the Indexes on a Table in Oracle?