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Skill Topic ยท Cinematic

๐Ÿ“˜ SQL Aliases - Columns aur Tables Ko Temporary Naam Dena

Aliases se tum columns aur tables ko chhota ya meaningful naam de sakte ho โ€” query readable aurโ€ฆ

Overview
๐ŸŒŸ

๐Ÿ“˜ SQL Aliases - Columns aur Tables Ko Temporary Naam Dena โ€” Quick Facts

๐Ÿ“Œ

CustomerID: CustomerName

๐ŸŽฏ

1: Ahmed Electronics

โšก

2: Sara Boutique

๐Ÿ”‘

3: Raj Traders

Topic 1
๐Ÿ“š

๐Ÿ“Œ Aliases Kya Hain?

๐Ÿ“š Alias ek temporary naam hai jo tum kisi column ya table ko dete ho. Yeh sirf us query keโ€ฆ
Topic 2
๐Ÿ’ก ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ Alias Syntax

๐Ÿ’ก Column Alias: sql SELECT column_name AS alias_name FROM table_name; Table Alias: `sqlโ€ฆ
Topic 3
๐Ÿ”’

๐Ÿ“Œ Demo Database

๐ŸŽฏ Customers: | CustomerID | CustomerName | ContactName | City |โ€ฆ
Topic 4
โญ

๐Ÿ“Œ Column Alias โ€” Basic

โญ `sql -- Column ko readable naam do SELECT CustomerID AS ID, CustomerName AS Name FROMโ€ฆ
Topic 5
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐Ÿ“Œ Column Alias โ€” Without AS

๐Ÿ”‘ `sql -- AS ke bina bhi kaam karta hai SELECT CustomerID ID, CustomerName Name FROMโ€ฆ
Topic 6
โœจ ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ Alias With Spaces

โœจ Agar alias me space chahiye, to double quotes ya square brackets use karo: `sql -- SQLโ€ฆ
Topic 7
๐Ÿ”’

๐Ÿ“Œ Concatenate Columns + Alias

๐ŸŒŸ Multiple columns ko combine karke ek alias do: `sql -- MySQL: SELECT CONCAT(CustomerName,โ€ฆ
Topic 8
๐Ÿš€

๐Ÿ“Œ Alias For Calculated Columns

๐Ÿš€ `sql -- Price ke saath tax calculate karo SELECT ProductName, Price, Price * 0.18 AS Tax,โ€ฆ
Topic 9
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐Ÿ“Œ Table Alias (Joins Me Bahut Useful!)

๐Ÿ“š `sql -- Table ko short naam do SELECT c.CustomerName, o.OrderID, o.Amount FROM Customersโ€ฆ
Topic 10
๐Ÿ’ก ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ Self Join Me Alias (Zaroori!)

๐Ÿ’ก Same table ko do baar use karne me alias mandatory hai: `sql -- Employees: Managerโ€ฆ
Topic 11
๐Ÿ”’

๐Ÿ“Œ Subquery Me Alias

๐ŸŽฏ `sql -- Subquery ke result ko alias do SELECT FROM ( SELECT CustomerID, COUNT() ASโ€ฆ
Topic 12
โœจ

๐Ÿ“Œ Column Alias vs Table Alias

โญ | Feature | Column Alias | Table Alias | |---------|-------------|-------------| | Kyaโ€ฆ
Topic 13
๐Ÿ”‘

๐Ÿ“Œ SQL Execution Order (Why WHERE Me Alias Nahi Chalta)

๐Ÿ”‘ ` SQL Execution Order: โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ” โ”‚ 1. FROM (tables identify) โ”‚ โ”‚โ€ฆ
Topic 14
โœจ ๐Ÿ“Š ๐Ÿ”ฌ

โœ… Summary

โœจ KEY POINTS: - AS keyword se column ya table ko temporary naam (alias) de sakte ho -โ€ฆ
Comparison
โœจ

๐Ÿ“Œ Column Alias vs Table Alias

โš–๏ธ

Kya rename?: Column/Expression

โš–๏ธ

Kahan use?: SELECT, ORDER BY

โš–๏ธ

AS optional?: โœ… Haan

Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 1

๐Ÿ“˜ SQL Aliases - Columns aur Tables Ko Temporary Naam Dena ka sabse sahi definition kya hai?

Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 2

๐Ÿ“˜ SQL Aliases - Columns aur Tables Ko Temporary Naam Dena ka '1' kya hai?

Complete! ๐ŸŽ‰
COMPLETE

๐Ÿ“˜ SQL Aliases - Columns aur Tables Ko Temporary Naam Dena Complete!

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โœ…

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