Oracle

Oracleserver-side operations, such as the following general:　1) Installing Oracleserver software2) Create a database (self-created at installation)3) Configure monitoring (self-configuring when installing)4) Start Oracle Instance5) Create user table

Permissions:Create sessionCREATE tableUnlimited tablespaceConnectResourceDbaCases:#sqlplus/nologSql> Conn/as sysdba;Sql>create user username identified by passwordSql> Grant DBA to username;Sql> Conn Username/passwordSql> select * from

1. Set Operation:The UNION operator returns two sets all records after a repeating element is removed.Example: Query for all employee information that belongs to department 10 and department 20.SELECT * from EMP where deptno=10Union SELECT * from

ORACLE11G will encounter such a problem, with the EXP whole library export, you will encounter such a problem, the empty table in the library can not be exportedSELECT * from All_all_tables AA where aa.owner= ' user name uppercase '---View all

In addition to the basic usage of Oracle's group BY, there are 3 extension usages, namely rollup, cube, grouping sets, respectively, described below:1, RollupFor the database table EMP, suppose that two of the fields are named A,b,c.If you use GROUP

External tables as a table type of Oracle, although not as easy as normal library tables, but sometimes in the data migration or data loading, it also brings great convenience, sometimes more convenient than loading data with Sql*loader, the

Installation and/etc/redhat-release of Oracle database under Linux PlatformUnder the Linux platform, do not modify the contents of the/etc/redhat-release when installing oracle10.2.0.1.But to use a runinstaller parameter to solve:-ignoresysprereqs.

The Listener is an Oracle server-based network service that listens to client connection requests to the database server side. Oracle officially defines it as:A process, listens for incoming client connection requests and manages network traffic

Environment Introduction Old environment New environment Operating system: redhat5.8 64-bit redhat6.4 64-bit Database version: Oracle 10.2.0.4 64-bit

Environment:Operating system: redhat6.4 64-bitDatabase version: 10.2.0.4 64-bitBuild test Reason: http://718693.blog.51cto.com/708693/1682945Description: Install 10.2.0.1 64-bit on redhat6.4 and then upgrade to 10.2.0.4 64-bit, in the execution DBCA

Oracle Deadlock Query and processingFirst, the phenomenon of database deadlockDuring the execution of the program, click OK or save button, the program is not responding, there is no error.Second, the principle of deadlockWhen you perform an update

First, EXPDP Export the database1. Export by userEXPDP Scott/Tiger@orcl DIRECTORY=oracle_dmp dumpfile=bak.dmp Schemas=Scott version=10.2.0.1.0;--If 10g imports 11g, plus version number2. Export by databaseEXPDP System/manager DIRECTORY=oracle_dmp

[SQL]View Plaincopy /* Inquire: Select job,broken,what,interval,t.* from user_jobs t; Unique identifier of the job job, automatically generated Whether the broken is in a running state, N; run; Y: Stop What stored procedure name

Unlike a physical repository, a logical standby is not an exact copy of the primary database. The same rowid, the values returned on the logical repository are not the same. Some data types or objects, and the logical repository does not support

One, sys users and system usersThe Oracle installation automatically generates SYS users and system users(1), sys user is superuser, has the highest privileges, has the SYSDBA role, has the rights to create database, the user's default password is

Hot weather, weekend at home knocking at the code to find a strange SQL, when using the LEFT JOIN table to join the query, a to go to join B, before the order of a table row, suddenly confused, the first row of records ran to the end, before the

An understanding of some of the basics of triggers, which is validated in this operationBefore Trigger[Email protected] ~]$ Sqlplus/as SYSDBASql> create user trigger_test identified by 123456; Sql> Grant create session to Trigger_test; Sql> grant

First of all, because many friends in the group said QTP connect Oracle a bit of a hassle, I do a complete tutorial for connecting to Oracle, I hope that the need to learn friends can look at the following:1, no matter what language, connect Oracle

Rmanconvert migrate win64-bit oracle to linuxoracle + asm manuscript startup mountalter database open read only;select open_mode from v$database;set serveroutput ondeclarev_check boolean;beginv_check:=dbms_tdb.check_db('Linux x86

Oracle Performance Optimization The ORACLE tutorial is: Excellent Oracle performance. Increasing the SGA buffer seems to have not significantly improved the performance, and the loading time has only increased by 1.73%. Next we will increase the