Most SQL tutorials teach clean datasets. Real work does not. The first dataset I worked with had duplicate records, missing values, messy dates, extra spaces, invalid emails, and category labels ...

SQL interviews changed. They don't ask you to write queries anymore. They give you a messy dataset and say: "Figure it out." Here's how I'd solve one explained simply. 𝗧𝗵𝗲 𝗽𝗿𝗼𝗯𝗹𝗲𝗺: You have ...

This project focuses on cleaning and analyzing a messy e-commerce dataset using SQL. The goal was to transform raw, unstructured data into a clean and reliable dataset, then extract meaningful ...