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 and PostgreSQL both conform to standard SQL. However, they contain several extensions and implementation details that differentiate one from the other. Here is table with some of the differences and how to deal with them. Read the rest of this entry »
Archive for category PostgreeSQL
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 make more efficient and legible SQL statements. Read the rest of this entry »
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 world of functionality to SQL queries.
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