Get Set for Set Theory: UNION, INTERSECT and EXCEPT in SQL
In a tad more than six minutes, you’ll see exactly how UNION, INTERSECT and EXCEPT work, starting in MariaDB 10.3, a few years back.
Ian explains what they are for, and the option to change default behaviour of DISTINCT with ALL (of which the ALL option was introduced in MariaDB 10.5).
How do you select a database in practice? How do you pretend to select it? And, if you want to be serious, how do you select it logically?
Those are the key questions I dug into, during my keynote last week at Percona Live Online.
For those who feel they don’t want to listen to the entire 30 minute video of the presentation, I have compiled a number of entry points for you below:
The latest in the series of video tutorials, it provides an overview of what’s changed with authentication from MariaDB 10.4, and looks in particular at unix_socket authentication. Although you’ll hopefully no longer need it, in case you have reverted to the old password authentication model, there’s the ubiqutous “how to restore access if you’ve lost your password” tutorial as well.
Continuing the MariaDB 10.4 theme, last week saw the release of Account Locking and Password Expiry by MariaDB Foundation software developer Robert Bindar. …
Demonstrating the primary JSON functions, JSON_VALID, JSON_COMPACT, JSON_DETAILED, JSON_INSERT, JSON_REPLACE, JSON_REMOVE and JSON_EXTRACT, Vicențiu covers the basics of MariaDB’s JSON functionality, culminating in a game data structure that sees footmen and peasant take on grunts in a human vs computer showdown.
With many of us spending lots of time at home in front of our webcams, MariaDB Foundation’s YouTube channel is getting some love. After lurking quietly after registration, we’ve kickstarted it recently by uploading all presentations from the recent MariaDB Day, held in Brussels in February.
MariaDB Foundation’s CEO, Kaj Arnö, put together Hi from Kaj (the rhyming should help clarify confusion on how to pronounce his name) where he asks for feedback on which video topics you’d like to see us tackle.
For now we’re focusing on features already available in MariaDB, not features. …
