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

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Stop Sending Every SQL Query to Your Most Expensive Model — Build a Router Instead

Stop Sending Every SQL Query to Your Most Expensive Model — Build a Router Instead

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4 min read
Solving the Classic SQL "Gaps and Islands" Problem: 3 Modern Approaches

Solving the Classic SQL "Gaps and Islands" Problem: 3 Modern Approaches

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5 min read
One CAST made a view 13x slower in PostgreSQL. So I benchmarked MySQL 8.4 against PostgreSQL 17

One CAST made a view 13x slower in PostgreSQL. So I benchmarked MySQL 8.4 against PostgreSQL 17

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6 min read
SQL Joins Made Simple

SQL Joins Made Simple

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3 min read
Building Answer Lineage for Enterprise Data Agents

Building Answer Lineage for Enterprise Data Agents

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5 min read
Postgres Advisory Locks Are Not the Lock You Think

Postgres Advisory Locks Are Not the Lock You Think

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3 min read
Why the index I added made my query slower

Why the index I added made my query slower

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4 min read
Optimizing an 18 TB Azure SQL Hyperscale Database — Part 5: Where AI Actually Helped

Optimizing an 18 TB Azure SQL Hyperscale Database — Part 5: Where AI Actually Helped

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6 min read
The Anatomy of a Slow Database Query: How to Diagnose, Deconstruct, and Fix It

The Anatomy of a Slow Database Query: How to Diagnose, Deconstruct, and Fix It

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5 min read
Nobody Warns You the Data Engineering Interview Isn't About Data Engineering

Nobody Warns You the Data Engineering Interview Isn't About Data Engineering

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2 min read
Two domains are 53% of the Databricks Data Engineer Associate exam

Two domains are 53% of the Databricks Data Engineer Associate exam

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4 min read
Every text-to-SQL benchmark score you've seen was measured without access control

Every text-to-SQL benchmark score you've seen was measured without access control

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5 min read
SQL Is Surviving, Franklin: When One Query Isn't Enough

SQL Is Surviving, Franklin: When One Query Isn't Enough

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13 min read
Turning Mermaid ER diagrams into shareable 3D schema tours

Turning Mermaid ER diagrams into shareable 3D schema tours

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1 min read
ANALYZING HOTEL BOOKING DATA: A TEMBO HOTEL SQL + POWER BI CASE STUDY

ANALYZING HOTEL BOOKING DATA: A TEMBO HOTEL SQL + POWER BI CASE STUDY

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2 min read
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