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Preview: René Nyffenegger on Oracle

René Nyffenegger on Oracle

Hello! I am René Nyffenegger and this is the site where I write articles on Oracle. I hope that, if time permits and I am not on holidays, I can write at least one article per week.

Last Build Date: Sat, 14 Nov 2009 11:10:00 GMT

Copyright: Copyright 2005 René Nyffenegger

On DAO and ODBC with Oracle

Sat, 14 Nov 2009 11:10:00 GMT

On XML Queries

Thu, 08 Oct 2009 15:15:00 GMT

On including files in SQL*Plus

Sat, 15 Mar 2008 22:30:00 GMT

On setting commit_write

Tue, 11 Mar 2008 22:00:00 GMT

Jobs at ADP

Sun, 29 Jul 2007 19:00:00 GMT

Emulating tables with PL/SQL (Part III)

Sun, 22 April 2007 10:45:00 GMT

sprintf and printf in PL/SQL

Sat, 14 April 2007 08:15:00 GMT

On finding changed values in a table with flashback

Sun, 31 December 2006 11:45:00 GMT

On parametrizing views with contexts

Sat, 3 December 2006 13:10:00 GMT

On creating an AJAX Application with Oracle

Thu, 30 November 2006 9:10:00 GMT

Beware of NOT IN and NULLS

Wed, 29 November 2006 03:10:00 GMT

On generating HTML output with SQL*Plus

Sat, 19 August 2006 12:15:00 GMT

On out parameters

Sun, 13 August 2006 12:50:00 GMT

Comments, finally!

Sun, 04 June 2006 15:45:00 GMT

On solving workspace conflicts

Tue, 09 May 2006 23:15:00 GMT

On emulating tables with PL/SQL (Part II)

Fri, 24 Mar 2006 12:30:00 GMT

On reading trace files with PL/SQL

Sun, 05 Feb 2006 00:00:00 GMT

On a breakable Oracle

Tue, 24 Jan 2006 21:30:00 GMT

On emulating tables with nested tables

Sun, 8 Jan 2006 23:50:00 GMT

On comparing mulitple SQL statements' statistics

Mon, 26 Dec 2005 23:45:00 GMT

On triggers, sequences, autonumbers and failing inserts

Mon, 19 Dec 2005 23:30:00 GMT

Is a sequence increased when I use a trigger and a sequence to generate autonumbers and an insert fails?

On a table's first five rows

Sun, 11 Dec 2005 23:30:00 GMT

Using rownum to select the first n rows does not always return the same records

On identifiying "periods of activity"

Mon, 28 Nov 2005 22:50:00 GMT

I have a table that logs what items were bought at what time from a vending machine. Now, I want to find periods of activity on this machine.

On creating bitmaps with pure PL/SQL

Tue, 22 Nov 2005 23:40:00 GMT

Out of idle curiosity, I wanted to know if it is possible to create bitmaps (BMPs) with pure PL/SQL alone. And it is!

On reading blobs from and writing blobs to a file

Sun, 20 Nov 2005 23:30:00 GMT

Writing blobs to a file and reading them from a file is too tedious for my liking. Therefore, I have written a package to faciliate these tasks. It comes with a procedure (to_file) which writes a blob to a file, a function (from_file) which reads a file into a blob and returns it and a procedure(from_file) that copies a file into the blob passed as parameter.

On mixing outer joins with inner joins

Wed, 16 Nov 2005 23:15:00 GMT

A few ways to combine an outer joins with an inner join in a select statement.

On improving a better describe

Sat, 12 Nov 2005 13:55:00 GMT

Recently, I presented

On eliminating outliers in avg() queries

Fri, 4 Nov 2005 23:10:00 GMT

On storing hierachical data

Mon, 17 Oct 2005 23:30:00 GMT

On generating ERDs with desc_table and neato

Mon, 3 Oct 2005 21:45:00 GMT

On a better describe

Sun, 25 Sep 2005 21:15:00 GMT

On the missing product() aggregate function

Mon, 22 Sep 2005 21:50:00 GMT

On using dbms_utility.name_resolve

Mon, 19 Sep 2005 20:10:00 GMT

On solving a sudoku with Oracle

Tue, 06 Sep 2005 22:00:00 GMT


On a member function calling a member procedure

Sat, 30 Aug 2005 21:30:00 GMT

I was very surprised when I tried to call a member procedure from a member function because I got a PLS-00363: expression 'SELF' cannot be used as an assignment. Why this is and how to avoid this.

On an integer not always being an integer

Sat, 27 Aug 2005 10:19:10 GMT

Until recently, I believed that an integer is a number that can only store whole numbers. Unfortunately, that is not always the case with Oracle.

On max and group by

Mon, 22 Aug 2005 16:22:48 GMT

This article presents three different ways to group a select's result set and find each group's record whose column is max().

On storing objects in tables

Tue, 16 Aug 2005 20:03:30 GMT

In this article, I want to demonstrate how to achieve a parent-child relationship with PL/SQL objects stored in tables.

On tracking data changes in a table

Mon, 08 Aug 2005 23:52:14 GMT