How to delete partition data in Oracle

How to delete partition data in oracle: 1. Use the "alter table table name DROP PARTITION name of the partition in the table;" statement to delete; 2. Use "alter table table name TRUNCATE PARTITION name of the partition in the table;" ” statement to delete.

The operating environment of this tutorial: Windows 7 system, Oracle 11g version, Dell G3 computer.

Oracle In actual business production environments, we often encounter that as the business volume gradually increases, the number of data rows in the table increases, and Oracle's impact on the management and performance of the table also increases.

The time for querying the data in the table and backing up the table will be greatly increased, and under certain circumstances, it will take more time to restore the data in the table as the amount of data increases. time.

At this time, Oracle database provides a partitioning mechanism, which divides the rows in a table into several parts. Can reduce management and performance issues of big data scales. The mechanism that uses this partitioning method to divide table data is called table partitioning, and each partition is called a partition table.

oracle delete partition data

Method 1: Delete partition by deleting partition

Delete partition , the data is also automatically deleted. Syntax:

alter table 表名 DROP PARTITION 表中分区的名称;

After deleting the partitions and data in the table, the indexes will become invalid. It is recommended to delete all indexes in the table after deleting the partitions, and then re-establish the indexes.

Method 2: Clear data

Syntax:

alter table 表名 TRUNCATE PARTITION 表中分区的名称;

Recommended tutorial: "Oracle Tutorial"

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