Oracle

September topdb Top Database index, topdb top database index is based on the search frequency analysis on Google, the database is searched more frequently, indicating the number of September topdb Top Database index compared to the same period last

2017.10.20, Guizhou, a city, Oracle 11.2.0.1 Health insurance-related applications function abnormal can not run, check the database alarm log has the following error:Fri OCT 20 16:03:04 2017Trace dumping is performing id=[cdmp_20171020160304]Fri

--The vast majority of dba/all/user/v_$/gv_$/session/index begins with a view--dba_tables means all the relational tables that the DBA has or can access. --All_tables All relational tables that a user has or can access. -User_tables means all the

Oracle database Opatch Patch Operation flow1. Confirm Database VersionSql> select * from V$version;2. Query patch Installation InformationSql> select * from Dba_registry_history;Oracle database patches are generally divided into two CPU and PSU

 Oracle Data Import and export imp/exp is equivalent to oracle data Restore and backup. the exp command can export data from a remote database server to a local dmp file, andtheimp command can take DMP the files are imported locally into a remote

Ount (1) compared to count (*): If your data table does not have a primary key, then count (1) is faster than COUNT (*) If there is a primary key, then the primary key (the Federated primary key) as the count condition is also faster than

Catalog DB Resync Error:1, setting on the server that starts the RMAN client$ Export event_10928 = 1$ Rman Target / @ Catalog /Rman> SQL "alter session set Tracefile_identifier = ' rman-10046 '" ";Rman> SQL "alter session SET events" 10046 Trace

Article Source: http://www.cnblogs.com/chenyan296076785/p/3533065.htmlI. What is the Oracle character setThe Oracle character set is a collection of symbols that interpret a byte of data, have a size, and have a mutual containment

Environment:Os:hp-unixDatabase: 11.2.0.4 Dual-machine RAC(i) PhenomenonWhile cleaning up the ORACLE logs, it was found that there were a lot of clsc*.log under the $oracle_home/log/{instance_id}/client. After observation, it is found that 2 logs are

Single-line functionTransform only one row returns a single result for each rowSingle-line functions divide characters, values, dates, conversions, universalCharacter functions: Casing control functions, character control functionsCapitalization

Sysdate+1 Plus One daySYSDATE+1/24 plus 1 hoursSYSDATE+1/(24*60) plus 1 minutesSYSDATE+1/(24*60*60) plus 1 secondsAnalogy to milliseconds 0.001 secondsAdditionSelect Sysdate,add_months (sysdate,12) from dual; --plus 1 yearsSelect Sysdate,add_months (

1, you can use Oradebug or strace-p to track whether the background or the foreground process dead or hang2, if the process fails, will be in the corresponding TRC file to write the latest information, based on this can obtain very important

Purpose of this article:Oracle is a large database The age and version and the environment are older, performance affected the business is normal, recently the company needs to migrate data from Oracle Server Windows2003 32bit to Windows2012/linux

Introduction: This article was written because one of my students recently set up a RAC cluster in the company, but the sequence and principle of its start-up and shutdown is not particularly clear, I also found in teaching work a lot of students

Error message:Official Download Instant client Download:Http://www.oracle.com/technetwork/cn/topics/intel-macsoft-102027-zhs.htmlMacos+navicat+instantclient Implementing Oracle

SUM: The function calculates the accumulation of expressions in a group andMin: Find the minimum value of an expression in a data window in a groupMax: Find the maximum value of an expression in a data window in a groupAVG: Used to calculate the

first, SQL ServerAdvantages:Ease of use, scalability for distributed organizations, data warehousing for decision support, integration with many other server software, and good price/performance ratio;Provides flexibility for data management and

parameter file: all parameter files are usually under $ORACLE _home/dbsSqlplus query statement: show parameter spfile;Network connection files: $ORACLE the _home/dbs/network/admin directoryControl file: SELECT * from V$controlfile;Data files:

Oracle Installation Install VirtualBox: # yum Install gcc kernel-devel kernel-headers# Yum Install virtualbox-5 ....#/ETC/INIT.D/VBOXDRV Setup compiles kernel modules manually and completes automatically during installation# usermod-g

Error due to moving or deleting DBF file:ora-01033:oracle initialization or shutdown in progressCause: Generally, this type of failure is usually caused by moving files that affect the inability of an IO operation due to corruption of the database