In my last article, I demonstrated that starting with Oracle Grid Infrastructure 12c (12.1), Oracle Cloud File system (ASM Cluster File System in cluster environment) supports database files (database version 11.2.0.4 and up) in addition to general purpose files, so that entire Oracle databases can be stored inside Oracle Cloud FS. In addition, for a database with its files stored… Continue Reading →

All Things Oracle Full Articles, Backup and Recovery

Introduction: Integrated Replicat is a feature unique to Oracle GoldenGate 12c, for Oracle Database versions starting from Oracle 11g (11.2.0.4) and Oracle 12c (12.1.0). Classic Capture Mode: The Oracle GoldenGate Extract process captures data changes from the Oracle redo log files or archive log files on the source database system. Integrated Capture Mode: Oracle GoldenGate Extract process works directly with… Continue Reading →

12c, All Things Oracle Full Articles

In the first three installments of this series I outlined the mechanisms used by Oracle to analyze a very simple query. Sticking with the informal approach, I’m going to look at the high-level strategy the optimizer takes when handling a more complex query. To do this I’ll be looking at query blocks, scratching the surface of query transformation, explaining why it’s a… Continue Reading →

All Things Oracle Full Articles

Recovery Manager (RMAN) is the preferred tool to backup and recover the Oracle Database. You can use recovery catalog or the control file of the target database for RMAN Repository, but Recovery Catalog is the preferred method as it offers several advantages over the others, like reporting operations, simple recovery in case of control file damage, and more. Generally in… Continue Reading →

11g, 12c, All Things Oracle Full Articles

We need a baritone voiceover man. You know how those huge TV shows – 24, Prison Break, Jane the Virgin – always start with a recap sequence to bring you up-to-date in case you’d missed the last episode. And it’s always a deep-voiced male narrator: “Previously on The Walking Dead,” he’ll say. We need that guy. Previously on Anatomy of a… Continue Reading →

All Things Oracle Full Articles

Introduction For versions of Oracle 11g R2, Oracle Recovery Manager (RMAN) replicates a database to a different Oracle home and opens it with NORESET LOGS option. From Oracle 12cR1, database RMAN introduced an option called ‘NO OPEN’, which duplicates your database to a new location and keeps it in an unopened state. Using this feature we can duplicate a database… Continue Reading →

12c, Backup and Recovery

Starting with Oracle Grid Infrastructure 12c (12.1), Oracle Cloud File system (ASM Cluster File System in cluster environment ) supports database files (database version 11.2.0.4 and up) in addition to general purpose files so that entire Oracle databases can be stored inside Oracle Cloud FS and can leverage the Advanced Data Services such as snapshots, tagging and auditing although replication and… Continue Reading →

12c, All Things Oracle Full Articles

In the second installment of this series we looked at individual access paths for the tables in a simple join query to highlight an important flaw in the default model that the optimizer uses for indexes. Having taken advantage of a recent enhancement that addresses that flaw we are now ready to move onto the problems that appear with the… Continue Reading →

All Things Oracle Full Articles, Oracle Database

In the first installment of this series I gave an informal description of how the optimizer would consider the possibilities when choosing an execution path for a simple two-table join between an orders table and an order_lines table that I had described. In that installment I supplied the DDL for the tables and its indexes; in this installment I’m going… Continue Reading →

All Things Oracle Full Articles, Oracle Database

My wife and I just welcomed our first child to the world. No, there’s no need to congratulate me; as Chris Rock once said, it’s no big deal, even cockroaches have babies. However, it does mean that I’ve often been up at 3 a.m. rocking my son, mumbling nursery rhymes to him.  Which, of course, always has me thinking of… Continue Reading →

All Things Oracle Full Articles, Database Administration, Database Development