My complete SQL Masterclass Notes in Tanglish is now live! Covers 30+ topics with syntax, examples, and step-by-step explanations. Perfect for both beginners and ...

There are less than two weeks left until the re-examination in July. Today, I worked on three questions that support the 'back end' of a DB, rather than SQL queries. Reverse engineering, privilege ...

Disappear till SEP 2026 and.. Clear all Data Engineering Rounds!! Here is HOW can you do in 5 steps 𝗦𝘁𝗲𝗽 𝟭: 𝗦𝗤𝗟 - Basic SQL Syntax - DDL, DML, DCL - Joins & Subqueires - Views & Indexes - CTEs ...

I wasted 3 months memorizing random SQL concepts. Then I realized: They all fit into 9 categories. Everything changed. 𝐓𝐡𝐞 𝐌𝐄𝐆𝐀 𝐆𝐔𝐈𝐃𝐄: 1️⃣ Data Integrity PRIMARY KEY, FOREIGN KEY, UNIQUE ...

source schema. sql -- Creates database and tables source data. sql -- Inserts sample data source data_cleaning. sql -- Cleans invalid/null/duplicate data source data_manipulation. sql-- Performs ...