greenplum介数据库绍之数据库管理(四)-创建数据库和用户管理（Database management in Greenplum database (four) - creating database and user management）.docVIP

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greenplum介数据库绍之数据库管理(四)-创建数据库和用户管理（Database management in Greenplum database (four) - creating database and user management）.doc

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greenplum介数据库绍之数据库管理(四)-创建数据库和用户管理（Database management in Greenplum database (four) - creating database and user management）

greenplum介数据库绍之数据库管理(四)-创建数据库和用户管理（Database management in Greenplum database (four) - creating database and user management） Introduction to database management GREENPLUM (four) - create database and user management On a 2011-04-08 15:09:01 / person classification: GREENPLUM See (82) / (1) / review score (5 / 0) GREENPLUM and ORACLE have the same user management system is completely independent of the operating system, and rights management system. Firstly, we introduce the database in GP. In the GP system initialization, GP will automatically create a database of three postgre, template0, template1. which postgre is used as a storage system for internal data, we do not delete it, also do not modify it. Template1 is the default data, we can create a database using template1 as a template, create a new database. So, if there is no other database object hope inheritance, do not create database template1. Create database GP syntax is simple, syntax is as follows CREATE DATABASE newname USING TEMPLATE tmplatedbname; Very fast, this process will generate the corresponding dictionary information. If you do not specify the using template clause, the system uses template1 database to create a new database as a template. We can also be other database as a template to create a new database. The template0 database is to create the template1 template, we do not use it to create the application object. GP allows you to create multiple DATABASE in a GP SERVER. But a DATABASE can only belong to one SERVER. A connection at the same time can only access a database. The concept of GP also has SCHEMA. A collection of objects are related to the nature of SCHEMA is a database, or can also be understood as the object of the namespace. GP allows you to create multiple SCHEMA in a database, but a SCHEMA can only belong to a database. When you create a database, automatically create a PUBLIC called SCHEMA system. If you need to create SCHEMA, the syntax is as follows CREATE SCHEMA schema_na