There are a few steps to complete before you can start with OBIEE 11g installation. This demo describes the steps required on a Windows system and requires
RCU is used to install certain schemas in a database that are required by Fusion Middleware products like Oracle Business Intelligence. Accepted database types are Oracle Database, IBM DB2 and Microsoft SQL Server. The steps required to run RCU
If you are planning to migrate a database application from Oracle to PostgreSQL, this article can help you to understand and solve some of the issues occurring in such a process. PostgreSQL has recently become feature-complete in many areas and therefore porting projects from Oracle might be a feasible option in much more cases. Oracle […]
PostgreSQL users have the option of extending the set of functions and operators available. If you have a common SQL or programmatic routine, custom functions can be an effective way to more succinctly and efficiently accomplish your tasks. Likewise, custom operators can be created to call these functions (or existing built-in functions) in order to […]
PostgreSQL recently added several great new features like Common Table Expressions (CTE), Recursive CTEs, Windowing Functions (my favorite) and Parallel restoring of dumps. The goal of this article is to provide an overview of the new PostgreSQL Windowing Functions. Previously limited to enterprise databases such as Oracle and DB2, they open up a completely new […]
Every MS SQL Server database consists of at least two physical operating system files and these files are specified when a database is created or altered. One and possibly more (secondary files) are used for the data (as well as indexes and allocation pages) and one for the transaction log.
It is a good idea to hold your database server inside a virtual machine and run it only if needed. This will save the memory space from being loaded with running services when you don’t need them. But what if you need to import a large database dump file and there is no sufficient space […]
Concurrency Several clients sharing a resource Contention Multiple users try to access a resource at the same time resulting in waits or event deadlocks. Deadlocks A deadlock occurs when two or more transactions are both in a wait state, with each one waiting for the other to release a lock before it proceeds.