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Marcus

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Karlsruhe, Germany Joined on Jun 30, 2026 https://sql.marcus-belz.de

Marcus

Jul 25

I Gave Claude Code 27 Rule Files Instead of One CLAUDE.md

#ai #claude #productivity #programming

13 min read

Marcus

Jul 21

AI-Assisted Coding Gave Me 799 Hardcoded Font Sizes

#ai #eslint #tailwindcss #webdev

17 min read

Marcus

Jul 20

Design Pattern // The Architecture of an ETL Process — How to Isolate Bad Data Cleanly

#sql #etl #database #architecture

23 min read

Marcus

Jul 16

Checking Data Quality with SQL — a Configurable Framework for Spotting Bad Data Generically

#sql #database #dataquality #tutorial

13 min read

Marcus

Jul 9

Is Claude a Woman or a Man? — and Why We Ask in the First Place

#watercooler #ai #claude #sql

8 min read

Marcus

Jul 9

Design Pattern // Safe Type Conversion with T-SQL — Catch Errors Instead of Aborting the ETL Process

#sql #sqlserver #database #etl

11 min read

Marcus

Jul 7

AI-Assisted SQL Development with Claude Code — Rules, Skills and Agents That Enforce Conventions

#ai #claude #sql #database

7 min read

Marcus

Jul 4

Data Quality: Dimensions and Error Classes — the Theory Behind the SQL Checks

#dataquality #sql #database #dataengineering

14 min read

Marcus

Jun 30

Data Migration: SQL Server to PostgreSQL — the Complete Guide

#postgres #sql #database #tutorial

8 min read

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