Oracle

1 View FirstSql> Show Parameter JobNAME TYPE VALUE------------------------------------ ----------- ------------------------------Job_queue_processes Integer 10If the value is 0 needs to be modified (if 0 does not run the job, this value is the

1. Preparing documentsRedHat Enterprise 5.4 64-bitOracle 11g R2 64-bit (two files)2. Create Users and directoriesUse root identity2.1 Creating a User>/usr/sbin/groupadd Oinstall>/usr/sbin/groupadd Oinstall>/usr/sbin/useradd

1. Data export:1 full export of database test, user Name System Password Manager exported to D:\daochu.dmpExp System/[email protected] file=d:\daochu.dmp full=y2 willDatabaseTable export for system users and SYS usersExp System/[email protected]

First, when establishing the table, pay attention to the role of pctfree parametersPCTFREE: The percentage of space reserved for a block, indicating when the data block can be insert, the default is 10, indicating that when the free space of the

First, after the installation is complete, unlock the Scott database steps:Enter SQL PlusPlease enter user name: SYSInput password: SYS as SYSDBA//The password here is not visible, note the spacesql> alter user Scott account unlock;The user has

This involves the physical and logical structure of the database.First, you need to understand that the physical structure of the database is determined by the operating system files of the database, each Oracle database consists of three types of

Import java.sql.*; The packages used in JDBC are almost always in import?java.sql.*; Import Oracel or MySQL packages and load drivers in your project: The classpath of the project and the classpath of the system are put in

Before using Oracle, you have to install his bloated client, although the Internet also provides direct-to-Oracle driver, but also to charge, recently Oracle finally enlightened, provide the official full-managed drive.This is the Oracle all-managed

Although the ORM mapping is used in the project, the optimization of the Oracle system is valuable, which summarizes the commonly used statements from the perspective of SQL statements.1. Optimizations in the From field:Oracle Yasuteru Load table

No SQL Server is as good as top, but Oracle has a hidden rownum column that can be used flexibly for paging effects, pagesize default 10 rowsMethod One:SELECT * FROM test where ID not in (SELECT ID from test where rownum Method Two:SELECT * FROM

Oracle is designed to be a very portable database software that can be run more stably, whether in Linux,unix or Windows download, and is supported on mainframes. This blog is only used to document the initial understanding of Oracle architecture

1 、-- querying information for database instances in RACSrvctl config database-d yjdd (instance name)-ADatabase Unique NAME:YJDDDatabase NAME:YJDDOracle Home:/u01/app/oracle/product/11.2.0/db_1Oracle user:oracleSpfile:

ORACLE Installation of Automatic Installation Software Package for the first time1. Configure the yum repository definition package.txt package list file in advance for the required software package for automatic installation: Take the official

Introduction to the ORACLE call interface (OCI) and the process of important functions Abstr]It is essential to interact with databases for user-owned programs. In order to store, read, and delete user data, we need to access the database frequently,

Symptom record after manual modification of spfile by OracleOracle 11G introduced the Memory_max_target and Memory_target parameters for Automatic Memory Management (AMM) of the database. The intention is to modify the size of the two parameters

Preliminary understanding of oracle architecture (1)When I first started learning oracle, I recorded my study notes. If you have any mistakes, I hope you can give me more advice. First, go to an important figure in the oracle architecture, as shown

Oracle architecture (3)Server Processes and backend processes server processes and backend processes are also two different concepts. server processes are also called front-end processes and are responsible for connecting to the Client on the oracle

Oracle architecture (1)Database and instance database: a collection of physical operating system files or disks. When Oracle's ASM (Automatic Storage Management) is used or RAW partitions are used, the database may not be used as a separate file in

Oracle architecture (2)Dedicated servers and shared servers 1. when I log on to a dedicated server, Oracle will always create a new process for me to connect to the Oracle server. The configured server is called the dedicated Oracle Server, this

JDBC-Oracle, jdbcExample: 1 publicclassTestJdbc {2 public static void main (String [] args) throwsException {// program entry, and throw an exception of 3 Class. forName ("oracle. jdbc. driver. oracleDriver "); // use the class loader to create an