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

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Fifteen Chinese cities have more sights than beds — and that is a feature, not a gap

Fifteen Chinese cities have more sights than beds — and that is a feature, not a gap

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2 min read
PGHist | History and audit of table changes in PostgreSQL

PGHist | History and audit of table changes in PostgreSQL

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3 min read
Rules-Only or LLM Judge? A Scoring Harness for the Second Reviewer of Agent SQL

Rules-Only or LLM Judge? A Scoring Harness for the Second Reviewer of Agent SQL

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7 min read
# From Database Tables to Long-Term Memory with Hindsight

# From Database Tables to Long-Term Memory with Hindsight

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8 min read
PostgreSQL for Beginners: A Serious Database That Is Free and Grows With You

PostgreSQL for Beginners: A Serious Database That Is Free and Grows With You

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2 min read
What Really Happens After You Execute a SQL Query in Oracle?

What Really Happens After You Execute a SQL Query in Oracle?

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4 min read
Building a Backup and Disaster Recovery Readiness Checker with Oracle AI Database 26ai

Building a Backup and Disaster Recovery Readiness Checker with Oracle AI Database 26ai

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6 min read
SQL Challenge #95: BETWEEN With Dates — Can It Miss Records?

SQL Challenge #95: BETWEEN With Dates — Can It Miss Records?

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2 min read
CREATE INDEX CONCURRENTLY Failed. The INVALID Index It Left Can Still Tax Every Write

CREATE INDEX CONCURRENTLY Failed. The INVALID Index It Left Can Still Tax Every Write

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9 min read
Como aprendi Apache Spark — Parte 17: Airflow, CI/CD e DataOps

Como aprendi Apache Spark — Parte 17: Airflow, CI/CD e DataOps

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16 min read
A Version Check Won't Recover a Lost Response

A Version Check Won't Recover a Lost Response

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10 min read
Como aprendi Apache Spark — Parte 16: Apache Kafka, CDC e pipelines incrementais

Como aprendi Apache Spark — Parte 16: Apache Kafka, CDC e pipelines incrementais

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19 min read
Como aprendi Apache Spark — Parte 15: Structured Streaming, Watermarks e Checkpoints

Como aprendi Apache Spark — Parte 15: Structured Streaming, Watermarks e Checkpoints

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18 min read
Behind ACID: How Databases Actually Implement the 4 Guarantees

Behind ACID: How Databases Actually Implement the 4 Guarantees

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2 min read
I counted which languages people make AI songs in: 10,725 songs, 75 languages, 30 days

I counted which languages people make AI songs in: 10,725 songs, 75 languages, 30 days

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3 min read
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