Oracle

See: http://blog.yemou.net/article/query/info/tytfjhfascvhzxcyt108In Oracle database operations, we sometimes use lock table queries and operations such as unlocking and kill processes, so how are these operations implemented? In this paper, we

--Querying Employee table dataSELECT * from EMP;--Create TABLE spaceCreate Tablespace sp_java1608DataFile ' e:\data\data1.mdf ' size M;--Modify Table space--Space becomes 200MAlter Tablespace sp_java1608Add datafile ' e:\data\data2.mdf ' size

Uninstall the Oracle JDK 1.8.0_31 version on your Mac because the version is too high. To install the old version.The order of uninstallation is: Go to finder, then click the application, press command+ up ARROW key, enter the root directory of the

http://blog.csdn.net/lifetragedy/article/details/51320192Oracle's execution planHow to get the execution plan Autotrace example using explain[SQL]View PlainCopy  Explain plan set statement_id=' Testplan ' For SELECT * from dual; [

Error a test prompts the user for password expirationWorkaround: Log in to the database by using the SYS userSqlplus sys/password as SYSDBA;Modify the Scott user passwordAlter user Scott identified by new password;Unlock Scott users by the wayAlter

ORACLE across Schema The Data MigrationThe test environment server is not enough, and colleagues need a new Oracle environment, the production environment to pull the data to build an internal system to run; this instance is not frequently used and

CREATE TABLE TB2 as SELECT * from EMP;ALTER TABLE TB2 modify EMPNO number (4) not null;Turn To Line 20WCreate INDEX Idxtb21 on TB2 (empno);Select Index_name from dba_indexes where table_name= ' TB2 ';--Verify that INDEX is set upSet autotrace

Just graduated this year, from graduation to now work formally work four months (internship months will not forget). There are many difficulties encountered in the work, there are many things learned, but the feeling learned is not enough, after all,

References: 1529864.1**************************************************RAM Swap SpaceBetween 1 GB and 2 GB 1.5 times the size of RAMBetween 2 GB and GB Equal to the size of RAMMore than GB**************************************************1. Set

The previous blog describes the method of backing up Oracle with the Navicat tool, which describes how to import and export an Oracle database using the PL/SQL developer tool. PL/SQL Developer is one of the primary tools used by Oracle databases

Oracle's automated backup in a Linux environment1. Automatic Export and history file Delete script Su-oracle Cd/db_backup/databak MV Orabak*.*/db_backup/old Exp Username/[email protected] full=y log=orabak ' date +%y%m%d%h%m '.

How to learn Oracle? Distinguishing several concepts is the key There are always some Oracle beginners ask the following questions, here to focus on the answer, I hope to help you.  1, if there is a certain base of the database, know what SQL is

======== Pseudo-Column ==========In an Oracle database, a pseudo-column does not exist in the table, but you can query from the table toFor example:SELECT ROWID pseudo-column,tname teacher name from teacher;========= Column number

SYS as[email protected]>startup open;ora-32004:obsolete or deprecated parameter (s) specified for RDBMS instanceORACLE instance started.ORA-32004: does not affect the use of the database. The error message is a parameter expiration. You can see the

First, why use stored procedures?If you often need to perform specific actions in your application, you can work with resumes on a specific process based on these actions. The use of procedures can simplify the development and maintenance of client

Tag:recover   ota    contains     library files    over    global    change     mode    src    I. Oracle DATABASE ArchitectureThe architecture consists of the following components:1. Oracle server: Consists of a database instance and a database file,

The Oracle database character set involves three aspects: Oracle Server-side character set Oracle client-side character set DMP file Character Set The first thing you need to know is that the parameters that affect the database

To import to a specific table space, you need to create a new tablespace, and if not, use the one you already have, just follow the steps belowEnter IMP username/password in the DOS window @ip address: Port number/DB instance file= ' path of the DMP

With the gradual launch of multiple systems, as operations personnel, database backup appears to be particularly important, considering the current system resources are limited, the database is in non-archival mode, using the data pump to complete

Monitoring Alert logsIdea: Follow the alert journal line number to the current last row and the previous scan row compared to the last scanned row from the previous scan line to scan to the final line#!/bin/bashscripthome= ' dirname $0 ' scriptname=