Database management

PostgreSQL 18: Tweaking relation statistics

Up to now, there is no official way in PostgreSQL to tweak optimizer statistics manually. While this is quite common in other relational databases, PostgreSQL did not provide anything to do this. The first steps to allow this have now(…)

PostgreSQL 18: REJECT_LIMIT for COPY

With the just released version of 17 of PostgreSQL, copy got the “ON_ERROR” switch. This is very useful if you load something which contains rows that cannot be inserted into the target(…)

Understanding Head Blockers in SQL-Server

A customer of mine had a recurring issue with one of his business critical applications where everything was frozen and stuck for the users. The issue was caused due to a head blocking transaction which increased blocking in the database(…)

Future Data Driven 2024 – introduction to vector databases

I had the opportunity to participate in the Future Data Driven 2024 event (https://datadrivencommunity.com/FutureDataDriven2024.html) with my colleague Stéphane Haby. Many speakers were present, and I was able to attend several sessions covering the following topics: Azure, AI, CosmosDB,(…)

Coming back to the Future Data Driven Summit 2024’s Event last night

Last night, I followed with Amine Haloui the Future Data Driven Summit 2024 from 3 PM to 2 AM This event was remote and very easy to follow. One day with 5 rooms and  more then 55 speakers…(…)

SQL Server: The importance of the default language during a login migration

Few weeks ago, I perform a migration of a database and the associate logins.After few days, the customer contact me for a error about “conversion of a varchar data type to datetime data type” on this application.The error was an(…)

“Edit Top 200 rows” does not work between SSMS 18.12.1 & SQL Server 2022

Recently after a migration from SQL Server 2012 to SQL Server 2022, a end user contact me because SQL Server Management Studio (SSMS) does not work anymore when he want t o edit rows… I was surprised and do a(…)

SQL Server: Basic AG – One listener, multiple databases

Introduction When it is not possible to have SQL Server Enterprise and there is a need to set up an AlwaysOn cluster, it is possible to use SQL Server Standard and implement basic availability groups. However, the Standard edition of(…)

CloudNativePG – Connecting external applications

Now that we know how we can benchmark a CloudNativePG deployment, it is time to look at how we can connect external applications to the PostgreSQL cluster. Usually, applications run in the same Kubernetes cluster and(…)

SQL Server Tips: How to know how long goes a shrink ?

Few days ago, I perform a shrink on a data file to spend a little bit space on a disk.The SQL Server is a test server and the customer does not want to expand the disk. I run the shrink(…)