12c
11.06.2014

Oracle Database 12c new features (Data Guard & RMAN)

Moja prezentacji z konferencji COIG http://prezi.com/ov5xbjytuzgw/?utm_campaign=share&utm_medium=copy&rc=ex0share


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EXADATA
07.05.2014

Exadata – skgxpinfo returns UDP after reconfiguration

We had to change the hostnames on Exadata with one of the customers. It is a well known fact that RAC doesn’t like such changes – we had to reconfigure the cluster and after the whole process I found the funny thing: So let’s try to turn RDS on 🙂 After shutting down all cluster […]


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12c
26.04.2014

Oracle 12c – FETCH FIRST n ROWS ONLY

Oracle 12c offers a lot of fascinating new features – among them (at last) "FETCH FIRST n ROWS ONLY" syntax. http://www.oracle-base.com/articles/12c/row-limiting-clause-for-top-n-queries-12cr1.php Out of curiosity I’ve checked with 10053 event, the following query: And this was the result 🙂


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RMAN
26.04.2014

Oracle myth: You need DBID to restore the controlfile

My experience shows that you don’t have to know the DBID now for restoring contorlfile from backup. If I know the name of backup piece, that contains controlfile I can do the following scenario: If I don’t know the name of the backup piece and there is a lot of strangely named files in a […]


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TUNING
26.09.2013

Oracle CBO. Query Transformer

Oracle Cost Based Optimizer consists of three main components: Query Transformer, Esitmator, Plan Generator. In this article I will try to show you some interesting features of the first component – Query Transformer. This component has some very powerful features and most of them remain in shadows, unrevealed while other new features gains all the […]


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ENTERTAINMENT
12.06.2013

InfoShare-oracle-hacking-session

Tak dobrych referencji jeszcze chyba nigdy nie dostałem 🙂 I gdybym cechował się jakąkolwiek skromnością, to bym tego nie publikował. http://rafalosinski.com/lifetech/najlepsza-znana-mi-prelekcja-czyli-warsztatu-z-hackowania-oracle-na-infoshare/


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SQL
30.04.2013

SQL For Modeling

Do you realy know SQL? I mean Oracle SQL…. Maybe you should take a closer look: http://ora-600.pl/art/sql-for-modeling.pdf


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SECURITY
02.04.2013

Privilege escalation in Oracle 11gR2 – part1

A few simple techniques of escalating privileges in database Oracle 11.2.0.3. http://ora-600.pl/art/oracle_privilege_escalation.pdf


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SECURITY
15.03.2013

Oracle Database Vault i szyfrowanie przstrzeni tabel VS administrator

Oracle stworzył Database Vault’a, żeby chronić wrażliwe dane przed administratorem DB. Po instalacji produktu i stworzeniu tzw. REALM’ów, SYSDBA traci uprawnienia do określonych czynności (m.in. zakładanie kont i wiele poleceń ALTER) ale głównie traci możliwość wybierania danych z tabel chronionych takim REALM’em. Sam Vault jednak nie wystarczy, bo admin mający dostęp do plików danych może […]


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