Oracle

This article transferred from: http://blog.chinaunix.net/uid-17079336-id-2832443.html1. Create a PRIMARY KEY constraint while creating a table(1) No namingCREATE TABLE Student (StudentID int PRIMARY key NOT NULL,Studentname varchar (8),age int);(2)

First, create a table spaceCreate tablespace pioneer_data ' /u01/datafile/pioneer_datadbf ' size 100m autoextend on extent management local;of which: Extent management: District Management mode for local managementTo see if the

Environment: This machine installs ArcGIS Server10.2,arcgis desktop10.2,64 bit oracle11g and Oracle32 bit client. Direct Connect and service connections are successful.Problem: I want to do the service release, in order to avoid data packaging

A simple query SQL format is as follows:SELECT ...From ....[WHERE ...] --Filter Line[GROUP by ... [Having ...] --group by groups The results of the previous where condition filtering, having a filter row group　　[ORDER by ...] --Sort the resultsEg:

A data dictionary is an important part of the Oracle database, where metadata (matedata) is stored, and Oracle RDBMS uses the database to manage object information and security information. The database administrator can obtain information about

Download instantclient-basic-nt-11.2.0.2.0 -bit client, post-pressurized storage, such as F:\instantclient_11_2 Copy the Oracle 11.2G Msvcr80.dll and Tnsnames.ora to the extracted instantclient_32-bit client root directory, where they

Instance Recovery phase:1. data File not synchronized2. Roll forward (redo redo)3. Submissions and uncommitted data in the file4. Open the Database5. Fallback (Restore undo)6. Submission data in the fileOptimize instance recovery: (Faster write of

CREATE OR REPLACE Package Pkg_cust_risk is--Author:administrator--CREATED:2014/4/22 10:00:27--PURPOSE: Customer riskVi_errorcode M_log. Errorcode%type DEFAULT 0; --Numeric Type exception codeVs_errortext M_log. Errortext%type DEFAULT NULL;

Common heap Table deficiencies:table Update has log overheadTable Delete Defectivetable record too large retrieval slowindex Back table read cost is largeorderly insertion difficult to read out in order Delete produces the most undo, redo also the

Flashback technology has a flashback table, a flashback delete, a flashback query, a flashback transaction query, a flashback transaction, a flashback database, and a flashback data archive. Among them, the flashback query, Flashback transaction

Oracle backup method mainly divided into data pump export backup, hot backup and cold backup three kinds, today first to practice the data pump backup and restore. Data pump export/import is a logical backup, both hot and cold backups are physical

Find Oracle difficult to drill down. One or two hours a day, stick to it! ---structure system and principleDba_data_files: Data file dba_tablespaces: Tablespace dba_segments: Segment Information dba_extents: Block information dba_free_space: Table

Installing Oracle Clientoracle-instantclient11.2-basic-11.2.0.4.0-1.x86_64.rpmoracle-instantclient11.2-devel-11.2.0.4.0-1.x86_64.rpm:http://www.oracle.com/technetwork/topics/linuxx86-64soft-092277.htmlRPM-IVH oracle-install*The build directory at

Sequence: is a database object provided by Oacle to produce a series of unique numbers.L automatically provide a unique valueL Shared objectsL mainly used to provide primary key valueL Loading sequence values into memory improves access efficiencyTo

Ordinary people, not including all the usual in the development of the use of 32-bit PC, so the installation is also ORACLE32-bit client. However, the general server is 64-bit, and the 64-bit Oracle client is installed, and you may encounter version

Dear All: The ViewName field in the database table sec.sec_function is inconsistent with the billing side, and many are missing: &businessid attempt to perform update sec.sec_function set V Iewname = '

--Data Dictionary SELECT * from Dba_jobs;select * from All_jobs;select * to User_jobs;select * from dba_jobs_running;Job_queue_process represents the number of jobs that Oracle can concurrentlyShow parameter job_queue_process;Alter system set

Oracle login connection I. Login 1. Use the client Directly configure in database: IP: 1521/orcl The IP address is the IP address to connect. 1521 indicates the port of the database to be connected. Orcl indicates the Instance name of the

Oracle learning-literacyPreface I have been dealing with Oracle databases over the past few days. Since I have not learned much about Oracle before, I just used Oracle as a data source. I don't know much about it. For example, databases, database

Oracle performance analysis 6: Index scanning of data access methods This section describes various index scanning methods. After learning about the features of various index scanning methods, you can determine whether the scanning methods used in