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Today, we're diving into a common but often overlooked problem in the world of relational and NoSQL databases: bad data and ...

SQL Injection is one of the first vulnerabilities almost every beginner learns, but the way it gets shown on YouTube can create ...

When exploring a PostgreSQL table, it's tempting to start with: SELECT * FROM sales; It's simple, but it can retrieve far more data ...

A simple daily average can hide complexities and return different values. We explore several edge-case scenarios to build the ...

Discover how the latest HNSW index build improvement makes vector search index construction up to 50x faster in InterSystems ...

Write SQL as a sequence of steps with the new pipe operator in ClickHouse 26.8. Mark Needham uses the UK property prices ...

Catch up on six SQL improvements from ClickHouse 26.6, 26.7, and 26.8. Mark Needham uses NYC taxi data to demonstrate ...

Read more about Advanced Spreadsheets and Reporting here: www.hougaard.com/spreadsheets Install from Microsoft ...

Five operators that make a WHERE clause much shorter to write — and one of them hides the same NULL trap we met in Episode ...

SQLite is one of the most widely deployed pieces of software ever created, yet most people never notice it is there. Born from a ...

SQL vs Python: The FILTERING Trick You MUST Know!** Question: ...

Learn how to read a SQL Server execution plan, identify bottlenecks, and optimize your queries using indexes and DMVs. In ...

Still running your data quality checks one query at a time and copy-pasting results into a spreadsheet? There's a faster way — and ...

Learn PostgreSQL BRIN Index in a simple and practical way. In this lesson, you will learn what a BRIN Index is, how it works, and ...