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

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I put reminders, contacts and recipes in the same Postgres table. Here is the SQL, and what it cost.

I put reminders, contacts and recipes in the same Postgres table. Here is the SQL, and what it cost.

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5 min read
Using an AST to validate AI-generated PostgreSQL before it runs

Using an AST to validate AI-generated PostgreSQL before it runs

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3 min read
The RLS Policy Was Correct. The Write Was Still Wrong.

The RLS Policy Was Correct. The Write Was Still Wrong.

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3 min read
MCP vs. a Direct Database Connection: A Security and Workflow Comparison

MCP vs. a Direct Database Connection: A Security and Workflow Comparison

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7 min read
One View Per Layer: Four Sharp Edges I Found in My Own Code

One View Per Layer: Four Sharp Edges I Found in My Own Code

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6 min read
A Small Fintech Challenge, and Why I Let Postgres Hold the Money

A Small Fintech Challenge, and Why I Let Postgres Hold the Money

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4 min read
Building WafyURL: A High-Performance URL Shortener with Real-Time Analytics & Security

Building WafyURL: A High-Performance URL Shortener with Real-Time Analytics & Security

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2 min read
Moving Oracle to PostgreSQL with a Single `INSERT` — No Oracle Client, No Python

Moving Oracle to PostgreSQL with a Single `INSERT` — No Oracle Client, No Python

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11 min read
Redis Caching in NestJS: I Cut Database Calls by 60% in Production

Redis Caching in NestJS: I Cut Database Calls by 60% in Production

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5 min read
Don't pick a partial index for speed: what I measured on a 10M-row Postgres queue table

Don't pick a partial index for speed: what I measured on a 10M-row Postgres queue table

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9 min read
A rate limiter changes when it leaves memory

A rate limiter changes when it leaves memory

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4 min read
Postgres Can Do Typo-Tolerant Search. You Don't Need Elasticsearch Yet.

Postgres Can Do Typo-Tolerant Search. You Don't Need Elasticsearch Yet.

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3 min read
Parte 2: Resolvendo o Desafio Técnico de Backend do PicPay

Parte 2: Resolvendo o Desafio Técnico de Backend do PicPay

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3 min read
PostgreSQL psql: Schema Navigation Quick Reference

PostgreSQL psql: Schema Navigation Quick Reference

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1 min read
How We Architected an Enterprise-Grade PostgreSQL Database on Supabase with a 99.99% Cache Hit Ratio

How We Architected an Enterprise-Grade PostgreSQL Database on Supabase with a 99.99% Cache Hit Ratio

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5 min read
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