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select * from SQL

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

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Our product search only returns rows the scanner can actually answer for

Our product search only returns rows the scanner can actually answer for

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5 min read
Star, Snowflake, or Galaxy? A Practical Guide to Data Warehouse Modeling

Star, Snowflake, or Galaxy? A Practical Guide to Data Warehouse Modeling

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10 min read
Grading a wrong answer by how wrong it is: ICD-10 proximity scoring in Postgres

Grading a wrong answer by how wrong it is: ICD-10 proximity scoring in Postgres

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4 min read
Subqueries and CTEs: Asking a Question Inside a Question

Subqueries and CTEs: Asking a Question Inside a Question

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8 min read
SQL Joins Explained: A Beekeeping Co-op in Six Queries

SQL Joins Explained: A Beekeeping Co-op in Six Queries

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7 min read
Understanding SQL Window Functions

Understanding SQL Window Functions

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5 min read
A New Take on Raw SQL in Python

A New Take on Raw SQL in Python

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3 min read
Cost Estimates or Timed Canaries: A Debate for Promoting Agent SQL

Cost Estimates or Timed Canaries: A Debate for Promoting Agent SQL

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9 min read
SQL Interview Question: Find App Store Power Purchasers with Two-Level GROUP BY

SQL Interview Question: Find App Store Power Purchasers with Two-Level GROUP BY

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5 min read
IQueryable vs IEnumerable: The Line Between C# and SQL

IQueryable vs IEnumerable: The Line Between C# and SQL

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2 min read
When the Dialect IS the API: Reading Army and jOOQ Side by Side, Through PostgreSQL Source

When the Dialect IS the API: Reading Army and jOOQ Side by Side, Through PostgreSQL Source

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26 min read
WINDOW FUNCTIONS VS AGGREGATE FUNCTIONS

WINDOW FUNCTIONS VS AGGREGATE FUNCTIONS

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2 min read
Window Functions vs Aggregate Functions in SQL: A Beginner-Friendly Guide

Window Functions vs Aggregate Functions in SQL: A Beginner-Friendly Guide

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11 min read
When SQL Has Nothing to Say: Handling NULLs

When SQL Has Nothing to Say: Handling NULLs

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3 min read
The Postgres job-claim query that silently claims the same job twice

The Postgres job-claim query that silently claims the same job twice

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9 min read
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