As a developer, I’m always on the lookout for ways to simplify my workflow and make my code more efficient. Lately, I’ve been experimenting with Postgres SQL lang tricks, and I’ve stumbled upon a few that have revolutionized the way I approach my projects.
ARRAY_AGG() with a Twist
One of my favorite tricks is using ARRAY_AGG() with FILTER (WHERE…). It’s a bit tricky to set up, as you need to nest queries just so, but the payoff is worth it. By using ROW_NUMBER() in the first stage, I can control the ordering of the arrays in the second stage. And the best part? I can concatenate multiple arrays in the outer stage 3 query, solving a multitude of problems quickly and efficiently.
UNNEST() – The Untapped Potential
I haven’t had a chance to test UNNEST()ing arrays inside a set returning join lateral, but I’m convinced it has its uses. If you’re familiar with functional programming, you know how powerful this technique can be.
Vernacular Postgres – The New Kid on the Block
If you’re into functional programming, you owe it to yourself to check out Vernacular Postgres. It’s a game-changer, and I’m not just saying that because it’s new and shiny. The possibilities are endless, and I’m excited to see where it takes us.
Conclusion
These Postgres SQL lang tricks have transformed the way I approach my projects. By leveraging these techniques, I’ve been able to simplify my code, reduce complexity, and increase efficiency. Give them a try, and I’m sure you’ll see the same benefits.
Further reading: Postgres Documentation