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Skill Topic ยท Cinematic

๐Ÿ“˜ SQL Views - Virtual Tables Banana

VIEW ek virtual table hai jo SELECT query ka stored result hai โ€” asli data store nahi karta, queryโ€ฆ

Overview
๐ŸŒŸ

๐Ÿ“˜ SQL Views - Virtual Tables Banana โ€” Quick Facts

๐Ÿ“Œ

Feature: Table

๐ŸŽฏ

Data storage: Disk pe stored

โšก

CREATE: CREATE TABLE

๐Ÿ”‘

Performance: Direct access

Topic 1
๐Ÿ“š

๐Ÿ“Œ VIEW Kya Hai?

๐Ÿ“š VIEW ek named SELECT query hai jo ek virtual table ki tarah kaam karti hai. View me dataโ€ฆ
Topic 2
๐Ÿ’ก ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ CREATE VIEW Syntax

๐Ÿ’ก `sql CREATE VIEW view_name AS SELECT column1, column2, ... FROM table_name WHEREโ€ฆ
Topic 3
๐Ÿ”’

๐Ÿ“Œ Basic View Example

๐ŸŽฏ `sql -- Indian customers ka view: CREATE VIEW IndianCustomers AS SELECT CustomerID,โ€ฆ
Topic 4
โญ

๐Ÿ“Œ View with JOIN

โญ `sql -- Customer orders ka detailed view: CREATE VIEW CustomerOrders AS SELECTโ€ฆ
Topic 5
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐Ÿ“Œ View with Aggregates

๐Ÿ”‘ `sql -- Monthly sales summary view: CREATE VIEW MonthlySales AS SELECT YEAR(OrderDate) ASโ€ฆ
Topic 6
โœจ ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ CREATE OR REPLACE VIEW

โœจ `sql -- View update karo (replace): CREATE OR REPLACE VIEW IndianCustomers AS SELECTโ€ฆ
Topic 7
๐Ÿ”’

๐Ÿ“Œ DROP VIEW

๐ŸŒŸ `sql -- View delete karo: DROP VIEW IndianCustomers; -- Safe drop: DROP VIEW IF EXISTSโ€ฆ
Topic 8
๐Ÿš€

๐Ÿ“Œ Updatable Views (INSERT/UPDATE/DELETE through View)

๐Ÿš€ Kuch views me directly data modify kar sakte ho: `sql -- Simple view (updatable): CREATEโ€ฆ
Topic 9
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐Ÿ“Œ WITH CHECK OPTION

๐Ÿ“š `sql -- View me sirf allowed data INSERT/UPDATE ho: CREATE VIEW IndianCustomers AS SELECTโ€ฆ
Topic 10
โœจ

๐Ÿ“Œ VIEW vs Table

๐Ÿ’ก | Feature | Table | View | |---------|-------|------| | Data storage | Disk pe stored |โ€ฆ
Topic 11
๐Ÿ”’

๐Ÿ“Œ Why Use Views?

๐ŸŽฏ ` View Benefits: 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”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ” โ”‚ โ”‚ โ”‚ 1.โ€ฆ
Topic 12
โญ

๐Ÿ“Œ Security View โ€” Hide Sensitive Data

โญ `sql -- Full table has: Salary, SSN, etc. -- Public view: sensitive columns hidden CREATEโ€ฆ
Topic 13
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐Ÿ“Œ Indexed/Materialized Views

๐Ÿ”‘ `sql -- SQL Server: Indexed View (materializes data) CREATE VIEW SalesSummary WITHโ€ฆ
Topic 14
โœจ ๐Ÿ“Š ๐Ÿ”ฌ

โœ… Summary

โœจ KEY POINTS: - VIEW ek virtual table hai โ€” SELECT query store karta hai, data nahi -โ€ฆ
Comparison
โœจ

๐Ÿ“Œ VIEW vs Table

โš–๏ธ

Data storage: Disk pe stored

โš–๏ธ

CREATE: CREATE TABLE

โš–๏ธ

Performance: Direct access

Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 1

๐Ÿ“˜ SQL Views - Virtual Tables Banana ka sabse sahi definition kya hai?

Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 2

๐Ÿ“˜ SQL Views - Virtual Tables Banana ka 'Data storage' kya hai?

Complete! ๐ŸŽ‰
COMPLETE

๐Ÿ“˜ SQL Views - Virtual Tables Banana Complete!

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โœ…

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