Oracle 修改schemas的方法一
由于业务的要求需要对其中的一个schemas进行更名,通过搜索发现从Oracle 11.2.0.2后提供了两种更名的方法。
由于业务的要求需要对其中的一个schemas进行更名,通过搜索发现从Oracle 11.2.0.2后提供了两种更名的方法。
方法一:通过导入导出的方法修改schemas的步骤。
•Do a user-level export of user A
•create new user B
•import system/manager fromuser=A touser=B
•drop user A
测试环境:数据库有schemas ADM_IDCS,需要更名为 ADM_JDCS
操作步骤:
a)创建ADM_JDCS用户,,权限需要一样
CREATE USER ADM_IDCS
IDENTIFIED BY 'ADM_IDCS'
DEFAULT TABLESPACE USERS
TEMPORARY TABLESPACE TEMP
PROFILE DEFAULT
ACCOUNT UNLOCK;
b)adm_idcs的导出
expdp system/oracle directory=dir dumpfile=full1.dmp schemas=adm_idcs
c)进行adm_idcs的导入
impdp system/oracle directory=dir dumpfile=full1.dmp fromuser=adm_idcs touser=adm_jdcs
d)删除原来的adm_idcs用户
drop user adm_idcs cascade;
经过以上操作便完成了修改adm_idcs成adm_jdcs。
本文永久更新链接地址:

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

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



The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

InnoDB's full-text search capabilities are very powerful, which can significantly improve database query efficiency and ability to process large amounts of text data. 1) InnoDB implements full-text search through inverted indexing, supporting basic and advanced search queries. 2) Use MATCH and AGAINST keywords to search, support Boolean mode and phrase search. 3) Optimization methods include using word segmentation technology, periodic rebuilding of indexes and adjusting cache size to improve performance and accuracy.

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]

Article discusses strategies for handling large datasets in MySQL, including partitioning, sharding, indexing, and query optimization.

The article discusses dropping tables in MySQL using the DROP TABLE statement, emphasizing precautions and risks. It highlights that the action is irreversible without backups, detailing recovery methods and potential production environment hazards.

The difference between clustered index and non-clustered index is: 1. Clustered index stores data rows in the index structure, which is suitable for querying by primary key and range. 2. The non-clustered index stores index key values and pointers to data rows, and is suitable for non-primary key column queries.

The article discusses creating indexes on JSON columns in various databases like PostgreSQL, MySQL, and MongoDB to enhance query performance. It explains the syntax and benefits of indexing specific JSON paths, and lists supported database systems.
