Development & Performance

Refactoring procedural to SQL – an example with MySQL Sakila

By Franck Pachot What I want to show in this blog post is that, as in mathematics where you have to apply some algebra rules to transform an equation to an equivalent one, the database developer must translate the business(…)

Make Oracle database simple again!

Introduction Let’s have a look at how to make Oracle database as simple as it was before. Oracle database is a great piece of software, yes it’s quite expensive, but it’s still the reference and most of the companies can(…)

DevOps World – Jenkins World – The Workshop On Day One

After achieving new challenges during customer activities where I was managing a quite huge project around Kubernetes & Jenkins X EcoSystem, I get the opportunity to attend the DevOps World – Jenkins World in Lisbon.A big thanks as I(…)

Scripting is not Just a Series of Commands

I saw, several times now, scripts were it is just a series of commands, sometime just created with copy/paste and few changes. This is far from best practices in terms of readability, maintainability and debug (ability 🙂).

SQL Server 2019: Java in SQL Server hard to believe, no?

It has already been a few months that we are testing the next version of SQL Server: SQL Server 2019. I already blogged about a previous version of SQL Server supporting R and Python. With the new version(…)

work Agile in a GxP-regulated environment

On 4 June 2019 I followed an invitation to wega-it’s Know-how & Networking Breakfast 2 2019 on “Agile Validation in GxP Projects”. So they were to discuss Agility in the context of GxP regulation. I had some earlier exposure to(…)

APEX Connect 2019 – Day 1

This year again the APEX connect conference spans over three days with mixed topics around APEX, like JavaScript, PL/SQL and much more. After the welcome speech and the very funny and interesting Keynote about “PL/SQL: A Career Built On(…)

RCSI with foreign keys, NULL values and paramater sniffing behavior

In this blog post let’s go back to the roots (DBA concern) with a discussion with one of my friends about a weird transaction locking issue. In fact, this discussion was specifically around two questions. The(…)

When you change the UNDO_RETENTION parameter, the LOB segment’s retention value is not modified

Below, I will try to explain, a particular case for the general error : ORA-01555 snapshot too old error.. Normally, when we have this error, we are trying to adapt the retention parameters or to tune our queries. SQL> show(…)

SQL Tuning – Mix NULL / NOT NULL Values

One of the difficulty when writing a SQL query (static SQL) is to have in the same Where Clause different conditions handling Null Values and Not Null Values for a predica. Let’s me explain you by an example : Users(…)