oracle本地索引分区、全局索引分区…-Mysql Tutorial-php.cn

Home

Database

Mysql Tutorial

oracle本地索引分区、全局索引分区…

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 07, 2016 pm 03:25 PM

oracle overall situation point Partition local index

Oracle索引分区分为本地索引分区（Local Partitioned Indexes）和全局索引分区 (GlobalPartitioned Indexes)两种。关于二者区别，只要Google一下就一大堆，我只是把自己测试过的列出一二，仅供学习交流。本地分区索引相对全局分区索引有一下优点： 1.若只

Oracle索引分区分为本地索引分区（Local Partitioned Indexes）和全局索引分区 (Global Partitioned Indexes)两种。

关于二者区别，只要Google一下就一大堆，我只是把自己测试过的列出一二，仅供学习交流。

本地分区索引相对全局分区索引有一下优点：

1.若只有一个分区需要维护，则只有一个本地索引受影响；（如合并分区时，只有合并的表分区的分区索引失效,而非分区索引以及全局分区索引在合并.删除表分区后全部失效）。

2.表分区和各自的本地索引可以同时恢复。

3.可以单独重建本地索引。（不能把分区索引整体重建）。

4.支持位图索引（全局分区索引不支持）。

http://blog.sina.com.cn/s/blog_8c6d7ff60100vdrt.html

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

R.E.P.O. Best Graphic Settings

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Assassin's Creed Shadows: Seashell Riddle Solution

2 weeks ago By DDD

R.E.P.O. How to Fix Audio if You Can't Hear Anyone

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

R.E.P.O. Chat Commands and How to Use Them

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Where is the login entrance for gmail email?

7543

CakePHP Tutorial

1381

What is the format of the account name of steam

win11 activation key permanent

nyt connections hints and answers

Related knowledge

How to check tablespace size of oracle Apr 11, 2025 pm 08:15 PM

To query the Oracle tablespace size, follow the following steps: Determine the tablespace name by running the query: SELECT tablespace_name FROM dba_tablespaces; Query the tablespace size by running the query: SELECT sum(bytes) AS total_size, sum(bytes_free) AS available_space, sum(bytes) - sum(bytes_free) AS used_space FROM dba_data_files WHERE tablespace_

How to get time in oracle Apr 11, 2025 pm 08:09 PM

There are the following methods to get time in Oracle: CURRENT_TIMESTAMP: Returns the current system time, accurate to seconds. SYSTIMESTAMP: More accurate than CURRENT_TIMESTAMP, to nanoseconds. SYSDATE: Returns the current system date, excluding the time part. TO_CHAR(SYSDATE, 'YYY-MM-DD HH24:MI:SS'): Converts the current system date and time to a specific format. EXTRACT: Extracts a specific part from a time value, such as a year, month, or hour.

How to encrypt oracle view Apr 11, 2025 pm 08:30 PM

Oracle View Encryption allows you to encrypt data in the view, thereby enhancing the security of sensitive information. The steps include: 1) creating the master encryption key (MEk); 2) creating an encrypted view, specifying the view and MEk to be encrypted; 3) authorizing users to access the encrypted view. How encrypted views work: When a user querys for an encrypted view, Oracle uses MEk to decrypt data, ensuring that only authorized users can access readable data.

How to view instance name of oracle Apr 11, 2025 pm 08:18 PM

There are three ways to view instance names in Oracle: use the "sqlplus" and "select instance_name from v$instance;" commands on the command line. Use the "show instance_name;" command in SQL*Plus. Check environment variables (ORACLE_SID on Linux) through the operating system's Task Manager, Oracle Enterprise Manager, or through the operating system.

How to uninstall Oracle installation failed Apr 11, 2025 pm 08:24 PM

Uninstall method for Oracle installation failure: Close Oracle service, delete Oracle program files and registry keys, uninstall Oracle environment variables, and restart the computer. If the uninstall fails, you can uninstall manually using the Oracle Universal Uninstall Tool.

How to import oracle database Apr 11, 2025 pm 08:06 PM

Data import method: 1. Use the SQLLoader utility: prepare data files, create control files, and run SQLLoader; 2. Use the IMP/EXP tool: export data, import data. Tip: 1. Recommended SQL*Loader for big data sets; 2. The target table should exist and the column definition matches; 3. After importing, data integrity needs to be verified.

How to check invalid numbers of oracle Apr 11, 2025 pm 08:27 PM

Oracle Invalid numeric errors may be caused by data type mismatch, numeric overflow, data conversion errors, or data corruption. Troubleshooting steps include checking data types, detecting digital overflows, checking data conversions, checking data corruption, and exploring other possible solutions such as configuring the NLS_NUMERIC_CHARACTERS parameter and enabling data verification logging.

How to set up users of oracle Apr 11, 2025 pm 08:21 PM

To create a user in Oracle, follow these steps: Create a new user using the CREATE USER statement. Grant the necessary permissions using the GRANT statement. Optional: Use the RESOURCE statement to set the quota. Configure other options such as default roles and temporary tablespaces.

See all articles