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

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Your lowest-rated product list may contain highly rated items

Your lowest-rated product list may contain highly rated items

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6 min read
Design a Payment System: the system design interview walkthrough

Design a Payment System: the system design interview walkthrough

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14 min read
Design WhatsApp: the chat system design interview walkthrough

Design WhatsApp: the chat system design interview walkthrough

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14 min read
Introducing sqlsift: schema-aware static analysis for SQL, no database needed

Introducing sqlsift: schema-aware static analysis for SQL, no database needed

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3 min read
Design a URL Shortener: the system design interview walkthrough

Design a URL Shortener: the system design interview walkthrough

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14 min read
System Design Interview Questions: the 2026 shortlist

System Design Interview Questions: the 2026 shortlist

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10 min read
Beyond the Hype: A Realistic Guide to Choosing Between SQL and NoSQL Databases

Beyond the Hype: A Realistic Guide to Choosing Between SQL and NoSQL Databases

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5 min read
Five lifecycle campaigns, one two-hour window, and the subqueries that became EXISTS

Five lifecycle campaigns, one two-hour window, and the subqueries that became EXISTS

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5 min read
WHERE vs HAVING in SQL: A Simple Way to Understand the Difference

WHERE vs HAVING in SQL: A Simple Way to Understand the Difference

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3 min read
DuckDB on AWS: Build a Data Validation Pipeline with Amazon S3

DuckDB on AWS: Build a Data Validation Pipeline with Amazon S3

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5 min read
How I Designed & Tested a Production-Ready SQL Server Database Schema for ERP Systems

How I Designed & Tested a Production-Ready SQL Server Database Schema for ERP Systems

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1 min read
I built and 100% tested an enterprise SQL Server database foundation for ERP systems [ApexLedger ERP]

I built and 100% tested an enterprise SQL Server database foundation for ERP systems [ApexLedger ERP]

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1 min read
dbt Macros & Jinja Explained (With Real Examples)

dbt Macros & Jinja Explained (With Real Examples)

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4 min read
Currently learning Data Science, here is what I've learnt so far. Pt.4

Currently learning Data Science, here is what I've learnt so far. Pt.4

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2 min read
From 35 seconds to half a second: 70 faster dashboards in plain Postgres

From 35 seconds to half a second: 70 faster dashboards in plain Postgres

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5 min read
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