Oracle

 ************************************************************************* * * * Original:blog.csdn.net/clark_xu Xu Changliang's Column************************************************************************--(1) The partition table contains

First,Oracletake random Data1,Oraclebasic ways to access data:1), full table scan: Perform a full table scan, Oracle reads all the records in the table, and examines whether each row satisfies the where condition. Oracle sequential reads are

PL SQL CursorsHrno records in the Hregright table that do not exist are populated with the Hrno in the House table (house only)Declare cursorHouse_cur is SelectH.regno,h.hrno fromHouse HwhereH.hrno is not NULL Group byH.regno,h.hrno

--virtualbox UUID issues for Oracle applicationsSystem environment:Operating system: MAC OS 10.10.3Application software: VirtualBoxFault:When you use a previously installed VirtualBox virtual machine, you are prompted to "UUID already exists

Http://www.111cn.net/database/Oracle/42484.htmOpen the Guest account on the server. Add the Guest account to the ORA_DBA user groupServer Configuration Listener.ora# Listener.ora Network Configuration File:d:\app\user\product\11.2.0\dbhome_3\network\

TNS is part of Oracle NET, a tool dedicated to managing and configuring Oracle Database and client connections, and in most cases the client and database must be configured to communicate, and TNS will be configured as follows:TNS Brief Introduction

In addition to saving permanent tables, the Oracle database can also establish temporary table temporary tables. These temporary tables are used to hold data for session sessions, or to store data in a transaction. When the session exits or the user

The following article reproduced from: http://www.cnblogs.com/200911/archive/2012/07/26/2610018.html, thank youThis feature greatly improves the performance of SQL execution and saves memory usage: we find that the statistics of single-table data

Today I encountered a very interesting problem with the number type scale, and I use a simple test case to illustrate this case. If there is a test table, there is a field type number, I insert the following two data CREATE TABLE TEST ( VARCHAR (12

Common query methods in OracleQuerying all user information in OracleSELECT * from Dba_users;Querying users and Passwords onlySelect Username,password from Dba_users;Querying Current User InformationSELECT * from Dba_ustats;Querying view text that

1,oracle jdbchttp Status 500-incorrect result size:expected 1, actual 02015-03-31 00:03:58,250 SQL error:12899, sqlstate:720002015-03-31 00:03:58,250 ORA-12899: Column "Zsxxw". " Cms_visit "." Visit_browser "value is too large (actual value: 62,

I. After upgrading to 11GR2The Oracle Database Upgrade Assistant (DBUA) configuration tool includes a command option to automatically extend system files, which can be upgraded from Oracle Express (XE or Free edition ) to their versions.The

Architecture-related Optimization issues: The database is very large, the traffic is very high, the sharing pool is very small: so the shared pool can not store a lot of parsed SQL statements, resulting in a lot of hard parsing, so the

In the normal development, to repeat the data often used to, I novice, contact Oracle also soon, the development of small knowledge points, record, the birds can bypass, if there is wrong, please correct me.To duplicate records can use distinct,

Official Document: Http://docs.oracle.com/cd/E56485_01/win.121/e55744/intro001.htm#ODPNT123Oracle's support for Microsoft Entity Framework EF6 is implemented in a new version of Odp.net.Oracle Data Access Components (ODAC) Windows Downloads:ODAC 12c

CURSOR traversal in Oracle stored procedure, call job timed execution1, first use for loopThe For loop is a relatively simple and practical method.First, it will automatically open and close cursors. Resolves the annoyance that you forgot to turn

This article was reproduced from: http://my.oschina.net/jang/blog/83009This approach is done by using the Oracle-provided lite client, which is a green, free-to-install client.(The official editions are available here):Clients used in Windows 32-bit

Development and history of databases in oracle learning getting started Series   Oracle learning starter Series Database development and history   This oracle learning getting started series is based on some of my work notes, projects to recall and

When the SQL Execution fails, the prompt is displayed again: ora-02429: Unable to delete the index that is used to force a unique/primary key, sqlora-02429 SQL 1: select segment_name, partition_name, tablespace_name from -- The tablespace that

Oracle initialization, oracle deletes all tables /* Step 2: create a temporary tablespace */ Create temporary tablespace mdb_temp Tempfile 'G: \ data \ oracle \ mdb_temp.ora' Size 10 m Autoextend on Next 5 m maxsize 2048 m Extent management