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

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Advanced SQL: Mastering CTEs and Window Functions

Advanced SQL: Mastering CTEs and Window Functions

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3 min read
Data definition language and data manipulation language

Data definition language and data manipulation language

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2 min read
Learn PostgreSQL extensibility through a gloriously bad idea: MM/DD/YYYY native datatype and GiST index

Learn PostgreSQL extensibility through a gloriously bad idea: MM/DD/YYYY native datatype and GiST index

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16 min read
Why AI-Generated Migrations Need a Different Gate Than Code Patches

Why AI-Generated Migrations Need a Different Gate Than Code Patches

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4 min read
Understanding Database Indexes Without the Jargon

Understanding Database Indexes Without the Jargon

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1 min read
Data Cleaning and Analysis with SQL

Data Cleaning and Analysis with SQL

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5 min read
Plataforma gratuita para practicar SQL en español

Plataforma gratuita para practicar SQL en español

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1 min read
How to Solve a Month-over-Month Churn SQL Interview Question

How to Solve a Month-over-Month Churn SQL Interview Question

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4 min read
Composite Indexes Explained: Why Column Order Is the Whole Game

Composite Indexes Explained: Why Column Order Is the Whole Game

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4 min read
Your Index Only Scan Is Lying: Covering Indexes and the Visibility Map

Your Index Only Scan Is Lying: Covering Indexes and the Visibility Map

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4 min read
QUERY_HISTORY has no PARENT_QUERY_ID. Here's how I traced which statement inside a Snowflake procedure regressed anyway.

QUERY_HISTORY has no PARENT_QUERY_ID. Here's how I traced which statement inside a Snowflake procedure regressed anyway.

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4 min read
How Database Indexes Work (And Why Yours Might Be Useless)

How Database Indexes Work (And Why Yours Might Be Useless)

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6 min read
Building Answer Lineage for Enterprise Data Agents

Building Answer Lineage for Enterprise Data Agents

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5 min read
The SQL Worked Perfectly. The Data Was Wrong.

The SQL Worked Perfectly. The Data Was Wrong.

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5 min read
SQL Is Surviving, Franklin: Now Rows Are Competing

SQL Is Surviving, Franklin: Now Rows Are Competing

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11 min read
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