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Skill Topic ยท Cinematic

๐Ÿ“˜ SQL Constraints - Data Rules Lagana

Constraints wo rules hain jo table ke data ko control karte hain โ€” galat ya invalid data databaseโ€ฆ

Overview
๐ŸŒŸ

๐Ÿ“˜ SQL Constraints - Data Rules Lagana โ€” Quick Facts

๐Ÿ“Œ

#: Constraint

๐ŸŽฏ

1: NOT NULL

โšก

2: UNIQUE

๐Ÿ”‘

3: PRIMARY KEY

Topic 1
๐Ÿค–

๐Ÿ“Œ Constraints Kya Hain?

๐Ÿค– Constraints data ke upar rules hain jo accuracy aur reliability ensure karte hain. Yehโ€ฆ
Topic 2
๐Ÿง 

๐Ÿ“Œ SQL Me Kaunse Constraints Hain?

๐Ÿง  | # | Constraint | Kya Karta Hai | |---|-----------|--------------| | 1 | NOT NULL |โ€ฆ
Topic 3
โœจ

๐Ÿ“Œ Column Level vs Table Level

๐Ÿ’ก `sql -- Column Level Constraint: CREATE TABLE Customers ( CustomerID INT NOT NULL, --โ€ฆ
Topic 4
โšก

๐Ÿ“Œ CREATE TABLE with All Constraints

โšก `sql CREATE TABLE Employees ( -- NOT NULL + PRIMARY KEY EmpID INT NOT NULL PRIMARY KEY,โ€ฆ
Topic 5
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐Ÿ“Œ Named Constraints (Recommended!)

๐ŸŽฏ `sql CREATE TABLE Products ( ProductID INT, ProductName VARCHAR(100) NOT NULL, Priceโ€ฆ
Topic 6
๐Ÿ”ฎ ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ ALTER TABLE se Constraints Add/Drop

๐Ÿ”ฎ Add: `sql ALTER TABLE Customers ADD CONSTRAINT pk_customer PRIMARY KEY (CustomerID);โ€ฆ
Topic 7
๐Ÿ”’

๐Ÿ“Œ All Constraints at a Glance

๐ŸŒ ` โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ฌโ”€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”‚ Constraint โ”‚ NULL Allow? โ”‚โ€ฆ
Topic 8
๐Ÿ“Š

๐Ÿ“Œ Real-World Example

๐Ÿ“Š `sql -- E-Commerce Database with Full Constraints: CREATE TABLE Categories ( CategoryIDโ€ฆ
Topic 9
๐Ÿค–

โœ… Summary

๐Ÿค– KEY POINTS: - Constraints = database level rules jo data integrity ensure karte hain -โ€ฆ
Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 1

๐Ÿ“˜ SQL Constraints - Data Rules Lagana ka sabse sahi definition kya hai?

Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 2

๐Ÿ“˜ SQL Constraints - Data Rules Lagana ka '1' kya hai?

Complete! ๐ŸŽ‰
COMPLETE

๐Ÿ“˜ SQL Constraints - Data Rules Lagana Complete!

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โœ…

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