Oracle

Oracle Support: Easy export of SQL Testcase

By Franck Pachot . Many people complain about the quality of support. And there are some reasons behind that. But before complaining, be sure that you provide all information. Because one reason for inefficient Service Request handling is the(…)

“Segment Maintenance Online Compress” feature usage

By Franck Pachot . On Twitter, Ludovico Caldara mentioned the #licensing #pitfall when using the Online Partition Move with Basic Compression. Those two features are available in Enterprise Edition without additional option, but when used together (moving online a(…)

Find the SQL Plan Baseline for a plan operation

By Franck Pachot . If you decide to capture SQL Plan Baselines, you achieve plan stability by being conservative: if the optimizer comes with a new execution plan, it is loaded into the SQL Plan Management base, but not(…)

Starting an Oracle Database when a first connection comes in

To save resources I thought about the idea to start an Oracle database automatically when a first connection comes in. I.e. if there are many smaller databases on a server, which are not required during specific times, then we may(…)

Cleanup a failed Oracle XE installation on Linux Mint

On this Blog I described on how to install Oracle XE on a current Linux Mint version (19.3. Tricia when writing the Blog). After the conversion of the Oracle provided rpm to a deb installation file with the tool(…)

Setup Oracle XE on Linux Mint – a funny exercise

On my old Laptop (Acer Travelmate with an Intel Celeron N3160 CPU) I wanted to install Oracle XE. Currently the available XE version is 18.4. My Laptop runs on Linux Mint 19.3 (Tricia). The Blog will describe the steps I(…)

Oracle recovery concepts

I’ve published a while ago a twitter thead on some Oracle recovery concepts. For those who are not following twitter, I’m putting the whole thread here:   🔴⏬ Here I start a thread(…)

A change in full table scan costs in 19c?

During tests in Oracle 19c I recently experienced this: cbleile@orcl@orcl> select * from demo4 where m=103; cbleile@orcl@orcl> select * from table(dbms_xplan.display_cursor); ... --------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | --------------------------------------------------------------------------- |(…)

Oracle disables your multitenant option when you run on EC2

I have installed Oracle 19.6 on an EC2 for our Multitenant Workshop training. And of course, during the workshop we create a lot of PDBs. If you don't have paid for the Enterprise Edition plus the(…)

Oracle 20c SQL Macros: a scalar example to join agility and performance

By Franck Pachot . Let’s say you have a PEOPLE table with FIRST_NAME and LAST_NAME and you want, in many places of your application, to display the full name. Usually my name will be displayed as ‘Franck Pachot’ and(…)