Database Administrator

MySQL backup script in Linux: #! /Bin/bash # Mysql autobackup shell # write by tuspark.cn # ------------------- User name and password related to the database, database name to be backed up, backup directory, etc. Dbuser = root Dbpasswd =

I. gap sequence SQL> alter database open;Alter database open*Row 3 has an error:An error is reported when the slave database recovers from open to the standby database at the same time: ORA-16004: backup database recovery requiredORA-01152: File 1

In addition to relational databases, Oracle integrates object-oriented elements, such as the ability to create types and inherit between types, type can include constructors, sorting functions, various member functions, stored procedures, and so on.

ORA-22160: element at index [1] does not exist It took a long time to figure out the reason for the call yesterday. Procedure stat_month_to_tmp Cursor cur_state_month_tmp isSelectId as order_id,Provinceid,AreaidTypeid,Info_id,O. code,Ordername, From

HBase adopts the master/slave Mode in distributed deployment. It consists of three major functional components: RegionServer, MasterServer, and ClientLibrary. Hadoop HDFS sub-framework is used in distributed storage. Distributed computing functions

MapReduce can be used in MongoDB for complex aggregate queries. Map and Reduce functions can be implemented using JavaScript. You can use db. runCommand or mapReduce command to execute a MapReduce operation: Db. runCommand (

Oracle PL/SQL query statements sometimes convert the number type field to the varchar2 typeReports or pages are frequently displayed:. 440. 4411.010.100It is very disturbing to say that the 0 before the decimal point is removed by the to_char or

1. Command Line Preface: To know the space occupied by a table, it is equivalent to the data size + index size. Show databases; (view the number of databases, also known as table schema; it is a bit of a string) 1.1 view the size occupied by a

C: \ Oracle \ product \ 10.2.0 \ client_1 \ BIN> rman target sys/password @ DGP  Recovery MANAGER: Release 10.2.0.1.0-Production on Tuesday January 31 00:59:06 2012 Copyright (c) 1982,200 5, Oracle. All rights reserved. Connect to the target

MongoDB Java drivers have provided comprehensive operations, divided into three parts: 1. Common user operations 2. Administrator operations 3. oplog operations You can add an eclipse testng plug-in and import the testng. jar package to the project.

I. Several startup methods: 1. startup nomount Non-installation startup. In this mode, you can execute: re-build the control file and re-build the database. Start the instance, that is, start the SGA and background processes. To start the instance,

I. Backup 1. Data Backup (executed on the master database)Rman> backup full database format '/u01/rmanbak/port_full_backup % U. bk '; 2. database software backup (executed on the master database)$ Cd/home/Oracle/product/10.2.0/$ Tar

Just getting started with php, and then start compiling the environment, starting with PostgreSQL... ----------------------------------------------------------- | System | CentOS 5.7. -----------------------------------------------------------If you

The delayed loading of Hibernae is a very common technique. By default, the set attributes of an object are delayed loading, and the objects associated with the object are also delayed loading by default. Hibernate uses this delayed loading method

The latest mysql versions require cmake compilation and installation. It is estimated that this method will be used in future versions. Therefore, we will record the installation steps and procedures for your reference.Note: This installation is the

Hive is an open-source query tool based on the Hadoop framework of facebook. That is to say, if you need hive, you must first install hadoop. This is a summary of recent experiences and experiences with hive. After installing and configuring hadoop,

Character TypeASCIICHRLOWERUPPERINITCAPCONCATSUBSTRLENGTHINSTRTRIMDumpLpadRpadREPLACE ASCII ('characters ')Returns the ASCII value of a character.Idle> select ASCII ('A') from dual;ASCII ('A ')----------97 Idle> select ASCII ('A') from dual; ASCII ('

My mongouard was unable to log on to the Oracle database because of a ora-600 error that caused the slave machine to hang. Refer: Symptom[Root @ skate01 ~] # Su-oracle[Oracle @ skate01 ~] $ Sqlplus "/as sysdba" SQL * Plus: Release 11.2.0.2.0

How to SetOracle11gImport backup10g 11g Export Statement: expdp userid ='Facial/Facial@OrclAs sysdba 'schemas = facial directory = DATA_PUMP_DIRdumpfile = aa. dmp logfile = aa. log version = 10.2.0.1.0   The red text is rewritten as needed. For

Quick MySQL installation and client Access authorization in Linux: Yum install mysql-server // install mysql server /Etc/init. d/mysqld start // start the mysql server --------------------------------- Client Access Authorization -----------------