oracle dba for beginners

A lot of the time, do Oracle DBA us, when the application administrator to inform us that the application is now slow, the database is very slow, when we go to the database to do a few examples of select also found the same problem, sometimes we can not start, Because we believe that the various life rates of the database are recommendations for meeting Oracle do

depends on whether you want to be a DBA or a developer? The certificate is sure to be taken, just like having a driver's license to drive a car. Second, there are teachers to get you started. Entering the industry will be quick, otherwise it is difficult to enter the industry role. If you have a friend who knows best, if not, it is also a good choice to attend the training. Choose a company with real training technology is the best, of course, our cen

This article mainly introducesOracle 10g isqlplusUseDBA accountNext, we will introduce them one by one. 1. vi. bash_profile Add Environment Variables exportJAVA_HOME=$ORACLE_HOME/jdk Save and exit. source.bash_profile 2. Switch to the correct directory cd$ORACLE_HOME/oc4j/j2ee/isqlplus/application-deployments/isqlplus 3. Run the JAZN shell. $JAVA_HOME/bin/java-Djava.security.properties=$ORACLE_HOME/sqlplus/admin/iplus/provider -jar$ORACLE_HOME/oc4j/j2ee/hom

Oracle Learning (18) [DBA]: Distributed DatabaseWhat is a distributed database? L data is physically stored on multiple nodes of the network, logically being a whole.The independence of distributed databases l the independence of distributed data means that users do not have to worry about how data is divided and stored, but only what data they need.Oracle distributed RDBMS local operations remote operation

(nomount); 2. Mount the database (Mount); 3. Open the database (open) 1. Start and instance In nomount, Oracle starts an instance and reads the specified initial parameter values in the spfile or pfile parameter file. Allocate the SGA shared memory area and create background processes. You can use the restrict and force options to enable instances. In restrict mode, only DBA is allowed to do the follow

What should I know first as an Oracle DBA in a completely new environment?Here, we will not talk about those major aspects, such as understanding the overall situation of the entire IT environment. If you already know this, you need to face these living databases. here we have summarized some general ideas to face a database first, so as to quickly understand the environment overview you are facing. This i

dynamic adjustment of the SGA area; SQL>show SGA; network connection--Session processes;Sql> SelectUsername,paddr fromV$sessionwhereUsername is not NULL; USERNAME paddr------------------------------ ----------------SYS 00000000f04dae60sys 00000000f04dae60c# #SCOTT 00000000f04dbea0SelectAddr fromV$processwhereBackground is NULL andAddr='00000000f04dae60';Select * fromV$processwhereBackground is NULL andAddr='00000000f04dae60';SetAutotrace onStat;SelectUsername,paddr fromV$sessionwhereUsernam

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As an Oracle DBA, a number of problems with character sets are frequently dealt with at work. But when you really want to write something about it, you suddenly don't have a clue. After a half-day, or decided to use the two character set as an example of the point of entry, it is a clue, perhaps in the course of the experiment, the problem will emerge one after another. Now, let's cut to the chase. The da

Oracle DBA Database Senior Engineer Training Upper (project implementation + Backup Recovery + foundation depth)Purchase Address:Http://edu.51cto.com/pack/view/id-739.html DescribeOracle DBA Database Senior Engineer Training course is the wind brother alone research and development of the fine combat courses, the road map is mainly to let everyone fast employ

tablespaces the SCOTT user uses select T.table_name, T.tablespace_namefrom dba_all_tables twhere t.owner = ' SCOTT '; 14. View Current user-owned permissions select T.privilege from Session_privs t; Sql> Select T.privilege from Session_privs t; PRIVILEGE----------------------------------------CREATE sessionunlimited tablespacecreate tablecreate Clustercreate viewcreate sequencecreate procedurecreate triggercreate typecreate OPERATORCREATE indextype 11 rows have been selected. 14. View role (

Oracle's system is too huge. For Beginners, it is inevitable that they will not start to feel like they want to learn anything, and the results will not be good. So share their learning experience, we hope that the beginners will have a general understanding of oracle and avoid detours. Oracle's system is too huge. For Beginn