Oracle

 PowerShell Call Oracle.ManagedDataAccess.dll## PowerShell Tune with Oracle.ManagedDataAccess.dll#[System.Reflection.Assembly]:: LoadFrom ("C:\oracle\odp.net\managed\common\Oracle.ManagedDataAccess.dll")$connStr ="Userid=hr;password=hr;data

Oracle database Backup and restore basic commands1. Get Help$ exp Help=y$ imp help=y2. Three ways of working(1) Interactive mode$ exp Then follow the prompts to enter the required parameters(2) command line mode$ exp User/[email protected]

It was suddenly discovered today that the "not equal to operator" in Oracle ignores null.For example, query comm is not equal to 300 of the records, I will take it for granted where comm! = 300It is expected to return a record that contains null

The concept of a transaction:Transaction: A transaction consists of a set of DML statements that make up a logical operationThe transaction begins with an end, and the transaction begins with a DML statement, ending with conmmit and rollback.The

Oracle Network ConfigurationThree configuration filesListener.ora,Sqlnet.ora,Tnsnames.ora, it's all on the$ORACLE the _home/network/admin directory.1. The role of Sqlnet.ora-----similar toLinux or otherUnix'snsswitch.conf file to determine how to

ORA-12528:TNS:listener:all appropriate instances is blocking new connectionsThe ORA-12528 problem is that the service in the listener uses the dynamic service, although the instance starts, but does not register to listen. The instance is registered

Group functions: Processing a set of data, returning a value for each set of data Common group functions: Count () avg () max () min () sum () Count () function1. Count (*): Returns the total number of rows without removing null values2. Count

Before you start to explain how Oracle sequence is used, add a little bit about Oracle client Sqlplus, that is, if you execute multiple lines of statement, you must add "/" to the end and execute! The topic of this article is to increase the primary

Index overviewThe index, like a table, also belongs to a segment (segment). It contains the user's data, which takes up disk space as well as the table. However, the data stored in the index is very different from the data storage form in the table.

This exception may occur because the exported user's table may have an empty data table.First of all:View: sql>show parameter deferred_segment_creation;If true, the parameter is changed to false;In Sqlplus, execute the following command: Sql>alter

Defined:A stored procedure (Stored Procedure) is a set of SQL statements that are compiled and stored in a database in order to accomplish a specific function. The user executes it by specifying the name of the stored procedure and giving the

Boot listener can not open, error!1[[Email protected] ~]$ lsnrctl Start2 3Lsnrctl forLinux:version 11.2.0.1.0-production on 06-aug-2014 19:40:524 5Copyright (c) 1991, 2009, Oracle. All rights reserved.6 7starting/opt/oracle/11g/bin/tnslsnr:please

Stored Procedure 1 CREATE OR REPLACE PROCEDURE Stored Procedure name 2 is 3 BEGIN 4 NULL; 5 END; Row 1:create OR REPLACE PROCEDURE is an SQL statement that notifies the Oracle database to create a stored procedure called skeleton, overwriting

This article uses Navicat for Oracle tools to connect OracleThe installation process I will not repeat this, and the general software installation process is similar. The following is the main explanation of navicat configuration.1, start the tool,

View a table with a high degree of fragmentationSELECT segment_name table_name, COUNT (*) extentsFrom Dba_segmentsWHERE owner not in (' SYS ', ' SYSTEM ')GROUP by Segment_nameHaving COUNT (*) = (SELECT MAX (COUNT (*))From Dba_segmentsGROUP by

New Features of Oracle11g: invisibleindex (invisible index) How do you feel if a table has more than a dozen indexes? Obviously, it will slow down the process of adding, deleting, and modifying data. Do not expect developers to build indexes. My

Java implements Oracle Database Backup Today, we will paste an Oracle database backup feature that has been implemented very early. This feature was designed at the university stage: Import java. io. file; import java. io. IOException; /*** Oracle

Differences between Oracle procedures and functions: oracle process functions Oracle process and function are expected to be more familiar. The following describes the differences between Oracle process and function. We hope that you can have a

LINUX5 + ASM + ORACLE11.2.0.3.0 installation manual I. Installation instructions:1. The database version and grid version must be consistent.2. If the grid version is lower than the oracle version, you must upgrade the grid version. Otherwise, dbca

OracleGoldenGate's thought sky-understanding the essence of OGG This article is an original article. For more information, see the source. Http://blog.csdn.net/msdnchina/article/details/38347285Oracle GoldenGate's thought sky-understanding the