DEV Community

Marcus profile picture

Marcus

404 bio not found

Location Karlsruhe, Germany Joined Joined on  Personal website https://sql.marcus-belz.de
Two Agents, One Working Tree — What Broke When I Ran Parallel Claude Code Sessions in One Git Repository
marcus1968 profile

Two Agents, One Working Tree — What Broke When I Ran Parallel Claude Code Sessions in One Git Repository

#ai #claude #git #productivity
Comments
26 min read
An EU Region Is Not an EU Provider — Vercel, Supabase and the GDPR Third-Country Question
marcus1968 profile

An EU Region Is Not an EU Provider — Vercel, Supabase and the GDPR Third-Country Question

#webdev #privacy #security #devops
Comments
21 min read
Agentic Coding from a User's Perspective — Experience: The Work Doesn't Disappear, It Shifts
marcus1968 profile
Marcus

Agentic Coding from a User's Perspective — Experience: The Work Doesn't Disappear, It Shifts

#ai #claude #productivity #programming
Comments
19 min read
Design Pattern // Logging an ETL Process with T-SQL — How to Capture Run, Component and Action in Evaluable Log Tables
marcus1968 profile
Marcus

Design Pattern // Logging an ETL Process with T-SQL — How to Capture Run, Component and Action in Evaluable Log Tables

#sql #sqlserver #etl #logging
Comments
30 min read
Deriving Data Quality Rules from the Schema — What the Metadata Already Knows
marcus1968 profile
Marcus

Deriving Data Quality Rules from the Schema — What the Metadata Already Knows

#dataquality #sql #postgres #database
Comments
22 min read
Formatting SQL Statements (Part 2) — Statement Structure: SELECT, WHERE, FROM, JOIN
marcus1968 profile

Formatting SQL Statements (Part 2) — Statement Structure: SELECT, WHERE, FROM, JOIN

#sql #sqlserver #postgres #cleancode
1
Comments
12 min read
Formatting SQL Statements (Part 1) — Identifiers, Delimiters, Commas, Aliases
marcus1968 profile

Formatting SQL Statements (Part 1) — Identifiers, Delimiters, Commas, Aliases

#sql #sqlserver #database #cleancode
Comments
20 min read
Three Severity Levels, Not Pass/Fail — and Why Severity Decides Where the Rule Lives
marcus1968 profile

Three Severity Levels, Not Pass/Fail — and Why Severity Decides Where the Rule Lives

#dataquality #sql #postgres #database
Comments
16 min read
Database CI/CD with PostgreSQL — the Complete Lifecycle from Object File to Automated Deploy
marcus1968 profile
Marcus

Database CI/CD with PostgreSQL — the Complete Lifecycle from Object File to Automated Deploy

#postgres #database #devops #cicd
Comments
10 min read
Setting Up a Claude Code Project with a Development Workflow and Database — the Open Starter Kit Explained
marcus1968 profile

Setting Up a Claude Code Project with a Development Workflow and Database — the Open Starter Kit Explained

#ai #claude #productivity #programming
Comments
10 min read
I Gave Claude Code 27 Rule Files Instead of One CLAUDE.md
marcus1968 profile

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

#ai #claude #productivity #programming
Comments
13 min read
AI-Assisted Coding Gave Me 799 Hardcoded Font Sizes
marcus1968 profile

AI-Assisted Coding Gave Me 799 Hardcoded Font Sizes

#ai #eslint #tailwindcss #webdev
Comments
17 min read
Design Pattern // The Architecture of an ETL Process — How to Isolate Bad Data Cleanly
marcus1968 profile

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

#sql #etl #database #architecture
Comments
27 min read
Checking Data Quality with SQL — a Configurable Framework for Spotting Bad Data Generically
marcus1968 profile

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

#sql #database #dataquality #tutorial
Comments
13 min read
Is Claude a Woman or a Man? — and Why We Ask in the First Place
marcus1968 profile
Marcus

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

#watercooler #ai #claude #sql
Comments
8 min read
Design Pattern // Safe Type Conversion with T-SQL — Catch Errors Instead of Aborting the ETL Process
marcus1968 profile
Marcus

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

#sql #sqlserver #database #etl
Comments
17 min read
AI-Assisted SQL Development with Claude Code — Rules, Skills and Agents That Enforce Conventions
marcus1968 profile
Marcus

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

#ai #claude #sql #database
Comments
7 min read
Data Quality: Dimensions and Error Classes — the Theory Behind the SQL Checks
marcus1968 profile
Marcus

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

#dataquality #sql #database #dataengineering
Comments
15 min read
Data Migration: SQL Server to PostgreSQL — the Complete Guide
marcus1968 profile

Data Migration: SQL Server to PostgreSQL — the Complete Guide

#postgres #sql #database #tutorial
Comments
8 min read
loading...