How to read oracle rebuild index

How to view Oracle's index rebuild

Rebuilding indexes is a critical task in optimizing Oracle database performance. To understand how to see if an index in Oracle has been rebuilt, you can use the following methods:

1. Use DBA_INDEXES view

 <code class="sql">SELECT * FROM DBA_INDEXES WHERE OWNER = 'YOUR_SCHEMA_NAME' AND INDEX_NAME = 'YOUR_INDEX_NAME';</code>

The output will contain information about the index, including:

• REBUILT: Indicates whether the index has been rebuilt. A value of 'YES' means that it has been rebuilt.
• LAST_ANALYZED: Indicates the index's last analysis time.
• LAST_REBUILD: Indicates the time when the index was last rebuilt.

2. Use ALL_INDEXES view

 <code class="sql">SELECT * FROM ALL_INDEXES WHERE OWNER = 'YOUR_SCHEMA_NAME' AND INDEX_NAME = 'YOUR_INDEX_NAME';</code>

The output result is similar to the DBA_INDEXES view, but also includes other information, such as:

• STATUS: Indicates the status of the index, such as 'VALID' or 'UNUSABLE'.

3. Use V$INDEX_STATISTICS View

 <code class="sql">SELECT * FROM V$INDEX_STATISTICS WHERE OWNER = 'YOUR_SCHEMA_NAME' AND INDEX_NAME = 'YOUR_INDEX_NAME';</code>

The output will contain information about index statistics, including:

• NUM_REBUILDS: Indicates the number of times the index has been rebuilt.

These methods allow you to easily view the rebuild status of indexes in your Oracle database and help you decide whether you need to rebuild the index as needed.

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