Everything our consultants learn while running databases for customers: Oracle, PostgreSQL, SQL Server, MySQL, MariaDB, MongoDB and Delphix. Expect hands-on posts about installation, day-to-day administration, backup and recovery, performance tuning, replication and upgrades.
By Franck Pachot . Did you ever use the COPY command in sqlplus? It’s very old, and documentation says : The COPY command is not being enhanced to handle datatypes or features introduced with, or after Oracle8i. The COPY command is likely to be deprecated in a future release. Deprecated? But it is back, with a new name, in the…
I read a lot of about orphaned database users in SQL Server, but I have almost never read about orphaned logins. Many of my customers migrate or remove databases in SQL Server. They forget – not every time but often – to remove the logins and jobs associated with these databases. I have created a script – without any cursors,…
BI Publisher offers you the possibility to create your own custom reports, I will describe you how to create a report displaying the tablespace size and used size in a simply way. It is advised to create a specific folder in which we will create our reports, because in case of upgrade you won’t lose your BI reports. In the…
This document explains how to configure BI Publisher in Enterprise Manager Cloud Control 12.1.0.4.0. Before the 12.1.0.4, the BI Publisher installation was fastidious, it was necessary to download, install and configure it. In Enterprise Manager 12.1.0.4 BI Publisher is already packaged. After a fresh installation or an upgrade to 12.1.0.4, BI publisher is installed but not configured. By selecting the…
By Franck Pachot . How to migrate from non-CDB to CDB? Of course all known migration methods works. But there is also another solution: upgrade to 12c if necessary and then convert the non-CDB to a PDB. This is done with the noncdb_to_pdb.sql which converts a non-CDB dictionary to a PDB one, with metadata and object links. But do you…
If you have a look on the last mysql 5.7.4 version or later you will probably see that there are several security improvements. The list of added security features and improvements can be seen on the following page: http://dev.mysql.com/doc/refman/5.7/en/mysql-nutshell.html There are three main improvements that are shortly described in this blog: 1. Nonempty plugin column 2. Password lifetime policy 3.…
By Franck Pachot . During our Oracle 12c New Features workshop I had a very good question about whether the session statistics are reset or not when doing ALTER SESSION SET CONTAINER. My initial thought was that they were not reset because it’s the same session (same SID and SERIAL#). But when I’m not 100% sure about something, I test…
The successful deployment of a Database Firewall depends on an effective policy. Oracle AVDF includes preconfigured firewall policies as described in the Firewall Policy page in the Policy tab of the Audit Vault Server console. These include policies that log all SQL statements, or log only unique SQL statements. In addition, the Database Firewall policy editor enables you to design…
By Franck Pachot . 12c came with a very nice feature: privilege analysis. You don’t know which privileges are required? then just grant DBA, run your application, and check which minimal privileges are needed. And today, I’ve discovered how it is very powerful: you can even see privileges used internally, even when not done by SQL, and even not documented.…
This short SQL Server blog post is meant to help people who have experienced the error messages 2812 and 203 with the EXECUTE command. The goal is to execute a simple query from a variable in a string format with the EXECUTE (exec) command. Very easy, isn’t it? Ok, let’s GO! If I execute “select * from sys.databases” in SSMS,…
Le plus grand événement français va bientôt avoir lieu (1 et 2 décembre) à Paris et il vous reste encore une semaine pour vous y inscrire! Pensez également à commander votre lunch box, ce qui peut être pratique si vous voulez manger 🙂 Pour ma part j’aurai l’occasion d’ouvrir le bal et de vous retrouver au cours d’une session…
I had the opportunity to attend Paul Randal’s session on advanced data recovery techniques at the Pass Summit. During this session one attendee asked Paul if a page that has just been corrupted can remain in the buffer pool extension (BPE). As you probably know, BPE only deals with clean pages. Paul hesitated a lot and asked us to test…
