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News
SQL Is Surviving, Franklin: When One Query Isn't Enough
10+ hour, 17+ min ago (1774+ words) Franklin survived SQL JOINs. Last time, we made tables talk to each other. We connected students to classes, classes to teachers, and somehow convinced Franklin that duplicate rows were not a database malfunction. He was beginning to feel confident. "Which…...
Turning Mermaid ER diagrams into shareable 3D schema tours
11+ hour, 20+ min ago (20+ words) Mermaid erDiagram is great for... Tagged with mermaid, sql, database, opensource....
5 EXPLAIN ANALYZE Patterns Every Data Engineer Should Know
8+ hour, 5+ min ago (180+ words) If you’ve stared at PostgreSQL’s EXPLAIN ANALYZE output and felt completely lost, you're not alone. A few months ago, I spent nearly three hours debugging a query that looked perfectly reasonable in code review but turned into a 15-second nightmare…...
Database Indexing Mistakes That Are Quietly Killing Your App's Performance
16+ hour, 14+ min ago (459+ words) Indexing is one of those topics every developer has heard of, most have used, and surprisingly few have actually reasoned through carefully. It's easy to add an index and move on — it's much harder to know whether that index is…...
NO idea where to start learning SQL?
19+ hour, 34+ min ago (246+ words) This article is a beginner friendly guide that gets you started into learning SQL as a programming... Tagged with programming, productivity, beginners, webdev....
SQLDungeon: Now with DuckDB
18+ hour, 47+ min ago (35+ words) SQL Dungeon grew a DuckDB marsh this weekend. Why, well because I wanted to learn it. SQL Dungeon started as a browser dungeon crawler where every room is a SQL puzzle …...
MySQL Overselling: Why SELECT Isn't Enough and How SELECT... FOR UPDATE Solves It
1+ day, 13+ min ago (431+ words) Imagine you’re running an online store, there’s exactly one item left in stock. Two customers click... Tagged with database, mysql, backend, softwareengineering....
Two Transactions, One Row: What Does MySQL Actually Let You See?
1+ day, 14+ min ago (554+ words) Two users, One database row, Both reading and writing at almost exactly the same time. Who sees... Tagged with database, mysql, softwareengineering, backend....
SQL vs NoSQL: Kenapa PostgreSQL Masih Jadi 'Swiss Army Knife' di 2026
1+ day, 2+ hour ago (23+ words) Sering kali kita... Tagged with postgres, mongodb, database, backend....
Window Functions in PySpark: A Practical Guide with ROW_NUMBER, RANK, LAG, LEAD, and Running Totals
23+ hour, 1+ min ago (104+ words) Non member readers can read it here for free If you work with Apache Spark, PySpark, Databricks, or SQL, sooner or later you will encounter a problem that looks deceptively simple: “For every customer, find their latest transaction.” “Calculate the…...