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Oracle Experiments...Knowledge comes with experience and experimentation
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Knowledge comes with experience and experimentation
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Oracle Experiments... | oracleexperiments.blogspot.com Reviews
https://oracleexperiments.blogspot.com
Knowledge comes with experience and experimentation
oracleexperiments.blogspot.com
Oracle Experiments...: November 2008
http://oracleexperiments.blogspot.com/2008_11_01_archive.html
8220;Knowledge comes with experience and experimentation” by Tom Kyte. Saturday, November 15, 2008. Sometimes, it is very important to DEFER the checking of certain integrity constraints. “Chicken-and-Egg” is the best example for this. To give solution to this problem, we need SQL Schema modification commands. Consider the following solution,. SQL - Create CHICKEN and EGG table without FOREIGN KEY Constraint SQL create table chicken( 2 chicken id number primary key, 3 egg id number);. Okay, We have creat...
Oracle Experiments...: May 2009
http://oracleexperiments.blogspot.com/2009_05_01_archive.html
8220;Knowledge comes with experience and experimentation” by Tom Kyte. Thursday, May 14, 2009. Oracle 11g - Alert Log (X$DBGALERTEXT). Today, i would like to share one new feature of Oracle 11g which i have come across recently. In Oracle 11g, gives us a x$dbgalertext fixed table that maps to the alert log file, and allowing us to write SQL queries against it. It is very good news for Oracle Developers; becuase they dont have to depend on DBA's to view the alert log content. Monday, May 4, 2009. Database...
Oracle Experiments...: Experiment On Primary Key
http://oracleexperiments.blogspot.com/2008/10/today-we-will-do-experiment-on-primary.html
8220;Knowledge comes with experience and experimentation” by Tom Kyte. Thursday, October 9, 2008. Experiment On Primary Key. Today, We will do the experiment on Primary Key. What is Primary Key? The primary key of a relational table uniquely identifies each record in the table. It can either be a normal attribute that is guaranteed to be unique or it can be generated by the DBMS. Primary keys may consist of a single attribute or multiple attributes in combination. Consider the following example,. SQL cre...
Oracle Experiments...: Chicken-Egg Problem
http://oracleexperiments.blogspot.com/2008/11/sometimes-it-is-very-important-to-defer.html
8220;Knowledge comes with experience and experimentation” by Tom Kyte. Saturday, November 15, 2008. Sometimes, it is very important to DEFER the checking of certain integrity constraints. “Chicken-and-Egg” is the best example for this. To give solution to this problem, we need SQL Schema modification commands. Consider the following solution,. SQL - Create CHICKEN and EGG table without FOREIGN KEY Constraint SQL create table chicken( 2 chicken id number primary key, 3 egg id number);. Okay, We have creat...
Oracle Experiments...: Validating your Data Entry for Trailing Blanks
http://oracleexperiments.blogspot.com/2008/10/validating-your-data-entry-for-trailing.html
8220;Knowledge comes with experience and experimentation” by Tom Kyte. Saturday, October 4, 2008. Validating your Data Entry for Trailing Blanks. Today, I would like to experiment the use of CHECK constraint to validate the trailing blanks in the data. Demo$Vino%orcl create table t(name varchar2(20) 2 check (length(name)-length(trim(name) =0) ;. Demo$Vino%orcl insert into t values('Tom'); 1 row created. Demo$Vino%orcl insert into t values('Tom Peter'); 1 row created. Demo$Vino%orcl select * from t;.
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Oracle Bullets: June 2009
http://oraclebullets.blogspot.com/2009_06_01_archive.html
Bullets that help you in firing the database. Tuesday, June 16, 2009. Dedicated server Vs Shared Server:. The user process and the server process are separate all together. In a dedicated server environment each user process has its own server process. To take the advantage of distributed processing the user process and server process can run on different machines. The ratio between the user process and server process in a dedicated server environment will be one – to – one. In a shared server the client...
Oracle Bullets: July 2010
http://oraclebullets.blogspot.com/2010_07_01_archive.html
Bullets that help you in firing the database. Wednesday, July 21, 2010. RAC User Equivalence - RSA and DSA. Why to use both the RSA and DSA while configuring SSH for User Equivalence? There are two versions of the SSH protocol; version 1 uses RSA and version 2 uses DSA, so we will create both types of keys to ensure that SSH can use either version. The ssh-keygen program will generate public and private keys of either type depending upon the parameters passed to it. The SSH1 protocol supports RSA keys.
Oracle Bullets: October 2010
http://oraclebullets.blogspot.com/2010_10_01_archive.html
Bullets that help you in firing the database. Thursday, October 7, 2010. Snapshot standby database Oracle 11g dataguard new feature. Oracle 11g introduces a new Feature in Dataguard – the Snapshot Standby Database which can be in read-write mode. A snapshot standby database is a fully updatable standby database that is created by converting a physical standby database into a snapshot standby database. Characteristics of snapshot standby database:. 5 After a switchover or failover between the primary data...
Oracle Bullets: August 2010
http://oraclebullets.blogspot.com/2010_08_01_archive.html
Bullets that help you in firing the database. Wednesday, August 25, 2010. Manual cleanup of failed CRS installation (10gR2). Manual cleanup of CRS installation. At times we will have to perform a manual cleanup of failed CRS installation or some old CRS installation that was done. Oracle provides two scripts to cleanup the CRS, The names and location of the scripts are given below. Script located at ‘$ORA CRS HOME/install’. Script located at ‘$ORA CRS HOME/install’. Manual Cleanup of CRS on LINUX. 4 Make...
Oracle Bullets: July 2009
http://oraclebullets.blogspot.com/2009_07_01_archive.html
Bullets that help you in firing the database. Wednesday, July 29, 2009. Basic Tips for Tuning SQL Statement. The main difference between subquery and join is:. 8226; subquery is faster when we have to retrieve data from large number of tables. Because it becomes tedious to join more tables. Join is faster to retrieve data from database when we have less number of tables. While using Order by Operator:. While Using AND operator:. 8226; If you use LIKE in your WHERE clause, try to use one or more leading c...
Oracle Bullets: Snapshot standby database Oracle 11g dataguard new feature.
http://oraclebullets.blogspot.com/2010/10/snapshot-standby-database-oracle-11g.html
Bullets that help you in firing the database. Thursday, October 7, 2010. Snapshot standby database Oracle 11g dataguard new feature. Oracle 11g introduces a new Feature in Dataguard – the Snapshot Standby Database which can be in read-write mode. A snapshot standby database is a fully updatable standby database that is created by converting a physical standby database into a snapshot standby database. Characteristics of snapshot standby database:. 5 After a switchover or failover between the primary data...
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Examples for day to day Oracle administration. How to configure Oracle VM manager 3.3 in a lab at home using local disks. September 25, 2014. This post was done using version 3.3 of Oracle VM Manager. Graphically things haven’t change much from version 3.2,. But the configuration is slightly different and there are other improvements as well, by the way, I love the new Virtual Machine console! The second disk has to be raw, no partitions. As an alternative you can use. If you follow the basic installatio...
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oracleexperiments.blogspot.com
Oracle Experiments...
8220;Knowledge comes with experience and experimentation” by Tom Kyte. Thursday, June 18, 2009. Oracle 11g R1: DDL LOCK TIMEOUT. Whenever you are trying to alter a table to add a new column, exclusive lock will be acquired on the table, if the table is used by any other transaction at the same time oracle will throw the following error. SQL DESC T Name Null? Note: I have opened one more Session #2 and inserted one record (DML) to table t and switched to Session #1 without issuing COMMIT in Session #2.
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The ORACLE EXPERT Network. Andrew Dyer is the Oracle Expert: DB Architect, PL/SQL Developer, Procedures, Triggers, Packages, and more.
Internally, we strive to improve our own expertise through our daily trials and tribulations, and from direct feedback from your people. We do not have a monopoly on Oracle Experience or Expertise, what we do have is a never-ending thirst for finding the best solutions to all things Oracle. If your people have a better way of doing something, we want to know about it! Performance Tuning and Optimization. We also perform certain Oracle Database Administration tasks as needed. ORACLE 10g Tips and Tricks.
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Skip to primary content. Skip to secondary content. November 21, 2012. Is expected to ensure that all the production and other systems setup are performing as per the expected standards with minimum downtime and degradation. Given the huge response of IT industries to the Oracle products. November 21, 2012. Is expected to ensure that all the production and other systems setup are performing as per the expected standards with minimum downtime and degradation. The functions performed by an Oracle Expert ma...
