DEV Community

select * from SQL

Posts on tips and tricks, using and learning about SQL for database development and analysis.

Posts

👋 Sign in for the ability to sort posts by relevant, latest, or top.
Data Migration, Conversion, and ETL — What I Actually Did, Across Two Eras

Data Migration, Conversion, and ETL — What I Actually Did, Across Two Eras

Comments
17 min read
Intuit OA 2026 Guide: Code, SQL & Bash Questions Explained

Intuit OA 2026 Guide: Code, SQL & Bash Questions Explained

Comments
4 min read
Manticore Search 28.6.6: UUID document IDs, ordered GROUP_CONCAT(), and 16 fixes

Manticore Search 28.6.6: UUID document IDs, ordered GROUP_CONCAT(), and 16 fixes

Comments
3 min read
Choose the Reporting Grain Before You Choose the Chart

Choose the Reporting Grain Before You Choose the Chart

Comments 1
3 min read
How to write a cohort retention query in SQL (that actually runs)

How to write a cohort retention query in SQL (that actually runs)

Comments
3 min read
Pg-Java v1.0 Debuts as New PostgreSQL Driver — Plus SQLite Fix & DuckCon #7

Pg-Java v1.0 Debuts as New PostgreSQL Driver — Plus SQLite Fix & DuckCon #7

Comments
4 min read
ON DELETE CASCADE Is Invisible in Your ERD and in Your Database Logs

ON DELETE CASCADE Is Invisible in Your ERD and in Your Database Logs

Comments
10 min read
Why Even Advanced AI Breaks Stock Registers: 12 Years of Snapshot Log Evolution and RDBMS Physics

Why Even Advanced AI Breaks Stock Registers: 12 Years of Snapshot Log Evolution and RDBMS Physics

Comments 1
4 min read
Tracking Tableau Server Storage Over Time with PostgreSQL

Tracking Tableau Server Storage Over Time with PostgreSQL

Comments
2 min read
That VARCHAR(255) Was Never a Decision. It Was a Default.

That VARCHAR(255) Was Never a Decision. It Was a Default.

Comments 1
4 min read
Optimizing an 18 TB Azure SQL Hyperscale Database — Part 1: Context & Principles

Optimizing an 18 TB Azure SQL Hyperscale Database — Part 1: Context & Principles

Comments
5 min read
Solon Data SQL: Three Layers of Data Access Without the Bloat

Solon Data SQL: Three Layers of Data Access Without the Bloat

Comments 3
5 min read
Why schema drift goes undetected

Why schema drift goes undetected

Comments 2
7 min read
Data Types and So much more

Data Types and So much more

Comments
2 min read
Top N per group is the query `LIMIT` can't write

Top N per group is the query `LIMIT` can't write

Comments
3 min read
👋 Sign in for the ability to sort posts by relevant, latest, or top.