在MySQL中,schema和database是同义词. CREATE SCHEMA和CREATE DATABASE是等效的. 但是其他的数据库产品(几乎所有数据库)有所不同.在oracle数据库产品中,schema是database的一部分. 表示the tables and other objects owned by a single user.
1. 查看当前数据库大小以及记录行数 select trim(pgdb.datname) as database, sum(b.mbytes) as mbytes, sum(a.rows) as rows from (select db_id, id, name, sum(rows) as rows from stv_tbl_perm a group by db_id, id, name) as a join pg_class as pgc on pgc.oid = a.id join pg_n
When data is stored on disk based storage devices, it is stored as blocks of data. These blocks are accessed in their entirety, making them the atomic disk access operation. Disk blocks are structured in much the same way as linked lists; both contai
the conception of schema is different in different db software. here i just refer to oracle schema. following is quote from "http://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements007.htm" schema conception: Schema Objects A schema is
One characteristic of an RDBMS is the independence of physical data storage from logical data structures. RDBMS的特点之一是物理数据与逻辑数据结构的独立性. Introduction to Schema Objects Schema Object Types Schema Object Storage Schema Object Dependencies SYS and SYSTEM S
1.这是Schema的definition: A schema is a collection of database objects (used by a user.) Schema objects are the logical structures that directly refer to the database’s data.A user is a name defined in the database that can connect to and access objects
原文发布时间为:2011-04-02 -- 来源于本人的百度文章 [由搬家工具导入] Generating EF Code First model classes from an existing database http://weblogs.asp.net/jgalloway/archive/2011/02/24/generating-ef-code-first-model-classes-from-an-existing-database.aspx http://www.microsoft
RMAN RECOVER TABLE Feature New to Oracle Database 12c (Doc ID 1521524.1) APPLIES TO: Oracle Database Cloud Schema Service - Version N/A and laterOracle Database Exadata Cloud Machine - Version N/A and laterOracle Database Exadata Express Cloud Servic
Using Active Database Duplication to Create Cross Platform Data Guard Setup (Windows/Linux) (Doc ID 881421.1) APPLIES TO: Oracle Database Cloud Exadata Service - Version N/A and laterOracle Database Cloud Service - Version N/A and laterOracle Databas
RMAN DUPLICATE DATABASE with SET NEWNAME failed: RMAN-05501 RMAN-05517 (Doc ID 387093.1) APPLIES TO: Oracle Database - Enterprise Edition - Version 10.2.0.2 to 11.2.0.4 [Release 10.2 to 11.2]Oracle Database Cloud Schema Service - Version N/A and late
RMAN 'Duplicate From Active Database' Feature in Oracle11g (Doc ID 452868.1) APPLIES TO: Oracle Database - Enterprise Edition - Version 11.1.0.6 and laterOracle Database Cloud Schema Service - Version N/A and laterOracle Database Exadata Express Clou
APPLIES TO: Oracle Database - Enterprise Edition - Version 10.1.0.2 to 11.2.0.2 [Release 10.1 to 11.2]Oracle Database - Enterprise Edition - Version 11.2.0.4 to 11.2.0.4 [Release 11.2]Oracle Database - Enterprise Edition - Version 11.2.0.3 to 11.2.0.