Skill Topic · Cinematic

📘 SQL Aliases - Columns aur Tables Ko Temporary Naam Dena

Aliases se tum columns aur tables ko chhota ya meaningful naam de sakte ho — query readable aur…

Overview

📘 SQL Aliases - Columns aur Tables Ko Temporary Naam Dena — Quick Facts

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CustomerID: CustomerName

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1: Ahmed Electronics

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2: Sara Boutique

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3: Raj Traders

Topic 1

📌 Aliases Kya Hain?

📚 Alias ek temporary naam hai jo tum kisi column ya table ko dete ho. Yeh sirf us query ke…

Topic 2

📌 Alias Syntax

💡 Column Alias: sql SELECT column_name AS alias_name FROM table_name; Table Alias: `sql…

Topic 3

📌 Demo Database

Topic 4

📌 Column Alias — Basic

⭐ `sql -- Column ko readable naam do SELECT CustomerID AS ID, CustomerName AS Name FROM…

Topic 5

📌 Column Alias — Without AS

🔑 `sql -- AS ke bina bhi kaam karta hai SELECT CustomerID ID, CustomerName Name FROM…

Topic 6

📌 Alias With Spaces

✨ Agar alias me space chahiye, to double quotes ya square brackets use karo: `sql -- SQL…

Topic 7

📌 Concatenate Columns + Alias

🌟 Multiple columns ko combine karke ek alias do: `sql -- MySQL: SELECT CONCAT(CustomerName,…

Topic 8

📌 Alias For Calculated Columns

🚀 `sql -- Price ke saath tax calculate karo SELECT ProductName, Price, Price * 0.18 AS Tax,…

Topic 9

📌 Table Alias (Joins Me Bahut Useful!)

📚 `sql -- Table ko short naam do SELECT c.CustomerName, o.OrderID, o.Amount FROM Customers…

Topic 10

📌 Self Join Me Alias (Zaroori!)

💡 Same table ko do baar use karne me alias mandatory hai: `sql -- Employees: Manager…

Topic 11

📌 Subquery Me Alias

🎯 `sql -- Subquery ke result ko alias do SELECT FROM ( SELECT CustomerID, COUNT() AS…

Topic 12

📌 Column Alias vs Table Alias

⭐ | Feature | Column Alias | Table Alias | |---------|-------------|-------------| | Kya…

Topic 13

📌 SQL Execution Order (Why WHERE Me Alias Nahi Chalta)

🔑 ` SQL Execution Order: ┌──────────────────────────────┐ │ 1. FROM (tables identify) │ │…

Topic 14

✅ Summary

✨ KEY POINTS: - AS keyword se column ya table ko temporary naam (alias) de sakte ho -…

Comparison

📌 Column Alias vs Table Alias

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Kya rename?: Column/Expression

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Kahan use?: SELECT, ORDER BY

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AS optional?: ✅ Haan

Quick Quiz

Quiz — Question 1

📘 SQL Aliases - Columns aur Tables Ko Temporary Naam Dena ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

📘 SQL Aliases - Columns aur Tables Ko Temporary Naam Dena ka '1' kya hai?

Complete! 🎉

📘 SQL Aliases - Columns aur Tables Ko Temporary Naam Dena Complete!

Aliens School · HIEN · Cinematic Knowledge

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