Database Tutorial

 What is the Internal Process of Indexing in SQL? To Dosto aaj hum padenge , ki indexing work kaise karti h internally or kis algorithm par work karti hai, To jayada time na lete hue suru karte hai. Introduction . Aaj ki technology powered duniya main , database ek application ka engine hota hai, jo ki data ko store and manage karne m use hota hai. And isme ek super cool technique hai jiska naam  Indexing  hain.Ye Super Cool technique humare data to fastly access karne main help krti hai. Indexing kaam kaise karta hai? Chaliye step-by-step samjhein: Step 1: Indexing Kya Hai? Sabse pehle samajh lete hain ki indexing kya hota hai. Imagine karein apka database ek bada sa library hai aur aapko ek specific book dhoondhni hai. Indexing wahi librarian hai jo aapko bataega ki woh book kaunsi shelf par hai. Database indexing bhi kuch aise hi kaam karta hai, woh data ko organize karta hai taki aapki queries jaldi execute ho sake. Step 2: Andar Ki Process Ab, indexin...

  To dosto kaise ho aap sabhi , to aaj hm sql query internally kaise work krti hu uska funda smjhange , To  Chalo suru krte hai, SQL ke working process ko har step mein aur detail mein samjhte hain: Query Writing : Jab aap SQL query likhte hain, toh wo ek request hoti hai database system ke liye data retrieve karne ya manipulate karne ke liye. For example, SELECT * FROM users WHERE age > 25 aapke users table se un users ko retrieve karega jinki umar 25 se jyada hai.  Parsing : Jab query database tak pahuchti hai, pehla step hota hai parsing ka. Yeh process query ko analyze karta hai, uske components ko identify karta hai aur syntax errors ko check karta hai. Isse query ko database engine samajhne ke liye tayyar kiya jata hai Query Optimization : Ab, optimizer aata hai picture mein. Optimizer query ko optimize karne ke liye strategies use karta hai. Wo decide karta hai ki kaise query ko execute kiya jaye t...