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

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Modelagem de Dados no Agro: Unindo fluxo de caixa e Ganho Médio Diário (GMD) no mesmo Banco de Dados

Modelagem de Dados no Agro: Unindo fluxo de caixa e Ganho Médio Diário (GMD) no mesmo Banco de Dados

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6 min read
I Tried to Analyze SQL Lineage Across 15 Databases — Everything Broke Until I Did This

I Tried to Analyze SQL Lineage Across 15 Databases — Everything Broke Until I Did This

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3 min read
Elasticsearch & Inverted Indices — The Death of SQL ILIKE (2026)

Elasticsearch & Inverted Indices — The Death of SQL ILIKE (2026)

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2 min read
"Table 'test.p' doesn't exist" — Understanding SQL Aliases and Default JOIN Behavior

"Table 'test.p' doesn't exist" — Understanding SQL Aliases and Default JOIN Behavior

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2 min read
How Databricks Genie Turns Plain English Into SQL Code

How Databricks Genie Turns Plain English Into SQL Code

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11 min read
SQL Views Explained: Write Once, Query Forever

SQL Views Explained: Write Once, Query Forever

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6 min read
CVE-2026-21643: FortiClient EMS Critical SQL Injection — Actively Exploited, No Credentials Required

CVE-2026-21643: FortiClient EMS Critical SQL Injection — Actively Exploited, No Credentials Required

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2 min read
I Analyzed 10 Million Records in 47 Seconds Using Python + DuckDB (No Spark, No Cloud)

I Analyzed 10 Million Records in 47 Seconds Using Python + DuckDB (No Spark, No Cloud)

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3 min read
Stop Using Subqueries: 3 Advanced SQL CTE Patterns That Saved My Production Database

Stop Using Subqueries: 3 Advanced SQL CTE Patterns That Saved My Production Database

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3 min read
MySQL InnoDB Locking: The Silent Killer Behind Database Crashes

MySQL InnoDB Locking: The Silent Killer Behind Database Crashes

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24 min read
CTEs vs Subqueries in SQL: Which One Should You Use?

CTEs vs Subqueries in SQL: Which One Should You Use?

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3 min read
PetStore: Pure Java for UI and Safe SQL Mapping

PetStore: Pure Java for UI and Safe SQL Mapping

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3 min read
SQL String Functions: Clean, Transform, and Tame Messy Data Like a Pro

SQL String Functions: Clean, Transform, and Tame Messy Data Like a Pro

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6 min read
How to Optimize BigQuery Costs (Real Techniques That Work)

How to Optimize BigQuery Costs (Real Techniques That Work)

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9 min read
Data modelling in Power BI: Joins, Relationships, and Schemas Explained.

Data modelling in Power BI: Joins, Relationships, and Schemas Explained.

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2 min read
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