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What is more efficient: arrays or single column values?

In PostgreSQL ( as well as in other rdbms ) you can define columns as arrays. What I wondered is: What is more efficient when it comes to space: Creating several columns or just creating once column as array? The(…)

SQL Interpolation with psql

The PostgreSQL psql utility provides some really nice features. One of these features is SQL interpolation which allows us to do interesting things, e.g. reading files and analyze the results directly in the database. This post(…)

A free PostgreSQL cloud database?

Recently I was looking for a free PostgreSQL cloud database service for testing. Why? Because I’d like to use such a cloud instance for testing no matter on which workstation or OS I am currently on. Another reason is, that(…)

PostgreSQL portable?

What a surprise: Headed over to the sourceforge page, downloaded, installed (which is just a matter of next/next/next) : Not really the latest patchset but far more than I(…)

SQL Server 2016: native support for JSON

A lot of discussions and most important, a feature requests in the Microsoft connect site here with more than 1000 votes is the origin of this new feature in SQL Server 2016. A lot of NoSQL have already this function(…)

using dbms_server_alert in combination with a custom monitoring solution

Lot’s of companies do not use Grid- or Cloud Control for monitoring their Oracle databases for various reasons but rather use open source tools like nagios. And lot of those either implemented custom script frameworks or rely(…)

draft release notes for PostgreSQL 9.5 online

Bruce Momjian, one of the PostgreSQL Core members, just compiled the first draft version of the release notes for the upcoming PostgreSQL 9.5 Some of the goodies that will show up: BRIN indexes(…)

quickly exchange code or text between workstations or teams

In a recent project I faced the following situation: One the one hand I had to execute scripts on a customer’s workstation while on the other hand I had to integrate the results of these scripts into a report on(…)

Show the Top 10 events from latest AWR snapshot

By Franck Pachot . Want to display a specific section from the latest AWR report? I'll share the script I use to get something like that:(…)

Parallel DML in 12c

By Franck Pachot . Following a question from Randolf Geist (who can imagine that there is something about parallel query that Randolf didn’t know?), I get back to some notes I’ve taken when 12c was out and I’ve(…)