ALL_TAB_PARTITIONS - SQL

Introduction

ALL_TAB_PARTITIONS is a system view in Oracle Database that provides information about the partitions of all tables and associated indexes accessible to the user. This view can be used to obtain information such as the partition key, partitioning type, number of partitions, and size of each partition.

Usage

The basic syntax for the ALL_TAB_PARTITIONS view is as follows:

SELECT *
FROM ALL_TAB_PARTITIONS
WHERE table_name = '<table_name>';

This query will return all partitions for the specified table.

Example

Suppose we have a table named SALES that is partitioned by SALES_DATE. We can query the ALL_TAB_PARTITIONS view to obtain information about this table's partitions:

SELECT partition_name, partition_position, high_value
FROM ALL_TAB_PARTITIONS
WHERE table_name = 'SALES';

This will return a list of all partitions for the SALES table, along with their position and high value.

Conclusion

In conclusion, the ALL_TAB_PARTITIONS view is a useful tool for obtaining information about partitioned tables in Oracle Database. Its rich set of metadata can help developers and administrators optimize performance and troubleshoot issues related to partitioning.