Chapter 15. Transactions and locks: Concurrency Concepts
Juggling a lot of things at once? If it seems like you’re constantly spinning plates, just imagine how your RDBMS feels. When multiple users toss and catch in the same database, they’ll eventually attempt to access and update the same data at the same time. Your system needs the chops to deal with these concurrent events, which is where transactions and locks come in. Transactions help you execute several statements as one unit, while locks allow you to block others from interfering with the data you’re working on. Think you can keep all the balls in the air? Well, practice makes perfect.
Funding your next travels
Now that Abby has a team of data professionals on her side, she’s ready to jet off on her next adventure. But first, she needs to fund her trip.
Abby follows these steps.
Abby checks the balance of each account.
She requests a transfer from her savings to checking.
Abby selects the option to transfer money ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Abby checks the balance of each account.
She requests a transfer from her savings to checking.