oracle complete reference

from the database, and then the input table is in the output dump file: IMP user/password file = exp. dmp commit = y buffer = 64000 full = y This method can be used for the entire database. The preceding section briefly analyzes the generation, calculation, and sorting of Oracle Database fragments for your reference only. Database performance optimization is a highly technical task that requires patience a

Today's optimization has been transformed to the optimization Wait (waits), in fact, the most fundamental point of performance optimization is also focused on Io, which is the most important aspect of performance, it is a good idea to wait in the system to discover the deficiencies of Oracle Library and the unreasonable utilization of some resources of the operating system. This paper focuses on the UNIX environment. One, through some of the operatin

The goal of this article is to complete the process of automated Oracle database backups by executing a shell script, and to generate its compressed files in the current directory. The following steps are implemented: 1. Log on to the Linux system as an Oracle user. 2. Create a Database.srcipt file to generate some parameter information for the backup database

(Eno in number, pename out varchar2, psal out number, Pjob out VARCHAR2) as begin --Get the employee's name, salary and position select Ename,sal,job into Pename,psal,pjob from EMP where empno =eno; end;/ Then we write Java code in Eclipse to link the

Oracle-hr Table query command exercises (a complete list of select commands) switch to the oracle hr user to practice 1. query the names and salaries of employees whose salaries are greater than 12000. Select initcap (concat (last_name, first_name) "name", salary from employees where salary> 12000; 2. query the name and department number of an employee whose empl

The process of establishing a complete database by the oracle database file recently helped the teacher write some functions of the website management system. Because it is not in the same place, the teacher sent me a library file (subsequently named. dmp), I want to build a database and run it on my own. Next I will talk about the steps I have done so as not to forget when I need them. Www.2cto.com 1. Firs

How Does Oracle query the complete definition statement of an object? Syntax: DBMS_METADATA.GET_DDL (Object_type IN VARCHAR2,Name IN VARCHAR2,Schema IN VARCHAR2 default null,Version IN VARCHAR2 DEFAULT 'compuble ',Model IN VARCHAR2 DEFAULT 'oracle ',Transform IN VARCHAR2 DEFAULT 'ddl ')Return clob; Example: select dbms_metadata.get_ddl ('table', 'emp', 'Scott ')

Label:Existing Oracle Table A table B ID COLA ID COLB 1 1 2 4 2 2 3 5 3 3 4 6 Full JOIN operation for table A and table B sql1:select t.id,cola,colb from (SELECT * from A) T fully Join (SELECT * from B) R on T.id=r.id The result is ID COLA COLB 1 1 2 2 4 3 3 5 6 because the SQL1 selected is T.id (that is, the ID of a), so the full connection after the connection field will only display the ID of a, and B's ID is null Similarly, if you choose r.id (th

consider Setting this parameter to? true. This saves disk space and minimizes install time. fromOracle 11g Release 2start, add adeferred_segment_creationparameter, the default value istruerepresents the time when the newly created table is assignedextent, the distribution is only started when the data is insertedextent. In a regular environment, the tables are not immediately assigned because they are createdextent, save space, reduce creation time, so can improve efficiency. You can use the

UNLIMITEDLOGGING EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO;Execute the script grant.txt that gives permissions, giving permissions to the user you just createdGive permissionGRANT Create User,drop user,alter USER, create any VIEW,DROP any view,exp_full_database,imp_full_database,Dba,connect,resource,create SESSION to XXXX;Start import (full import), where the File:dmp file is located, ignore: Because some tables already exist, the table is not imported.Add Ignore=y at the back. Spec

Quick Reference for installation, deployment, and configuration of a single Oracle 11g instance on Linux 1. re-build the Oracle user group of the host and standardize uid gid to ensure the permission specification for shared storage mounting or other requirements Userdel-r oracleGroupadd-g 500 oinstallGroupadd-g 501 dbaUser add-g oinstall-G dba-u 500

Complete notes on learning oracle plsql pl/SQL anonymous block declare -- Declaration part, optional begin -- execution part, required exception -- exception, optional end; -- the required stored procedure create procedure name (which can be written to the parameters to be received) is -- declares some beginexceptionend; uses the begin name (parameter) end; to use the stored procedure function create functi

Create user _ authorization _ in Oracle and import data Complete process: create users, create tablespaces, authorize, and create tables L create a user Create user BBS identified by bbs123; L create a tablespace Create tablespace ts_bbs datafile 'e:/BBS/bbs_data.dbf' size 100 m; The tablespace directory must be created manually. L allocate the tablespace to the user

Some time ago, the ORACLE server was installed for the K3CLOUD project. Some colleagues were not familiar with LINUX and ORACLE, and now they have prepared documents for reference by later maintenance personnel. ORACLE Installation 1. First install the dependency package (the newly installed centos is required and is n

Welcome to the Oracle community forum and interact with 2 million technical staff. Go to oracle to query all the foreign keys that reference the records of a table. query the table's primary key constraint name select * fromuser_constraintsewheree.table_name table name; -- input to query all records that reference this

After the ORACLE database is started. This statement enables you to see all the parameters used by the Oracle database using the SELECT * from V$parameter . For Oracle 's parameter files, it is divided into spfile binaries and pfile text files. Today's databases generally use the spfile binary as The reference file to

Complete optimization of Oracle Database in UNIX environment2007-04-19 12:54:02 Author: changelive Browse Number: 14 Text size: " large "" in the "" Small "into the forumToday's optimization has been transformed to the optimization Wait (waits), in fact, the most fundamental point of performance optimization is also focused on Io, which is the most important aspect of performance, it is a good idea to wait

Tags: restore 4.0eset paths rod Operating system resetlogsrmanwww. Original Library Target Library Operating system CentOS 6.4 CentOS 6.4 Host Name Sht-sgmhadoopnn-01 sht-sgmhadoopnn-02 Ip 172.16.101.55 172.16.101.56 Database version 11.2.0.4.0 11.2.0.4.0 $ORACLE _base /u01/app/