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

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SQL Functions: Data Analysis just got better

SQL Functions: Data Analysis just got better

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2 min read
SQL Subqueries and CTEs: Writing More Powerful Queries

SQL Subqueries and CTEs: Writing More Powerful Queries

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2 min read
Why Learning Data Engineering Is Still a Smart Bet in 2026 (Even With AI Eating the Easy Parts)

Why Learning Data Engineering Is Still a Smart Bet in 2026 (Even With AI Eating the Easy Parts)

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2 min read
One Cell, Many Values: When a Column Holds a List

One Cell, Many Values: When a Column Holds a List

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8 min read
Why Using FLOAT for Financial Pipelines is a Silent $100k Trap (and How PostgreSQL NUMERIC Saves Your Ledger)

Why Using FLOAT for Financial Pipelines is a Silent $100k Trap (and How PostgreSQL NUMERIC Saves Your Ledger)

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2 min read
How to Master Intermediate SQL in Under 10 Minutes

How to Master Intermediate SQL in Under 10 Minutes

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5 min read
SQL Joins: Understanding How to combine Data from Multiple Tables

SQL Joins: Understanding How to combine Data from Multiple Tables

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2 min read
Your Login Tests Are Green. What Did cursor.execute Actually Receive?

Your Login Tests Are Green. What Did cursor.execute Actually Receive?

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4 min read
Who gets rated higher: age, age gap and the reciprocity myth - from 24 million ratings

Who gets rated higher: age, age gap and the reciprocity myth - from 24 million ratings

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4 min read
SQL Window Functions Explained

SQL Window Functions Explained

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4 min read
LIKE in SQL, Explained for Beginners

LIKE in SQL, Explained for Beginners

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7 min read
Learning SQL? Here is a Practical Guide to Read and Write SQL Queries.

Learning SQL? Here is a Practical Guide to Read and Write SQL Queries.

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6 min read
Ottoch - ask your database questions in you plain language, self-hosted....

Ottoch - ask your database questions in you plain language, self-hosted....

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1 min read
Open-source tool: Practical experience in converting large quantities of SQL code syntax : 'PIVOT' function rewrite (Case 2)

Open-source tool: Practical experience in converting large quantities of SQL code syntax : 'PIVOT' function rewrite (Case 2)

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6 min read
Relational Database Performance and Indexing at Scale

Relational Database Performance and Indexing at Scale

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3 min read
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