Relational Model in DBMS in hindi

Relational Model ek database management system (DBMS) ka data model hai, jise relational databases ke liye istemal kiya jata hai. Is model mein data ko tables, rows (records), aur columns (attributes) ke form mein organize kiya jata hai. Relational Model ko Edgar F. Codd ne 1970 mein develop kiya tha.

DBMS के ये Topics के बारे में जानें :-

Relational Model in DBMS in hindi

Is model mein data ko entities (entities) aur unke attributes (properties) ke roop mein represent kiya jata hai. Har entity ko ek table ke roop mein darj kiya jata hai, jiske har row ek specific record ko represent karta hai aur har column us record ke attributes ko represent karta hai.

Relational Model ke kuch mukhya tatva hote hain:

  1. Tables (Relations): Data ko tables mein represent kiya jata hai, jahaan har table ek specific entity ko represent karta hai. Tables ke andar rows (records) hote hain, jinhe tuples bhi kaha jata hai, aur columns (attributes) hote hain, jinhe fields bhi kaha jata hai. Har row ek unique identifier ke madhyam se identify kiya jata hai.

  2. Primary Keys: Har table mein ek ya adhik columns primary keys ke roop mein chune jate hain. Primary key uniquely identify karta hai ki har row ko kisi specific entity se joda jaye. Yeh key duplicate values allow nahi karta hai aur data integrity ko maintain karta hai.

  3. Foreign Keys: Foreign keys ek table mein dusre table ke primary keys ke reference ke roop mein istemal hote hain. Ye keys ek table ki rows ko dusre table ki rows se jodte hain, aur isse relationships ko establish kiya jata hai. Foreign keys data consistency aur data integrity ko maintain karte hain.

  4. Relationships: Relational Model mein tables ke beech relationships ko establish kiya jata hai. Dusre words mein, entities ke beech ke connections aur associations ko define kiya jata hai. Relationships ki prakar include one-to-one, one-to-many, aur many-to-many.

  5. Query Language (SQL): Structured Query Language (SQL) Relational Model ke liye standard query language hai. SQL ka upyog data retrieval, data manipulation, aur data definition ke liye kiya jata hai. SQL queries ki madad se data ko select, insert, update, aur delete kiya ja sakta hai.

Relational Model ke faide hain ki isme data ko structured aur organized tarike se store kiya jata hai, jisse data retrieval aur manipulation asan ho jata hai. Isme data redundancy kam hoti hai, kyonki data ek baar hi store hota hai aur relationships ke through access kiya jata hai. Relational databases flexible, scalable, aur robust hote hain, aur aam taur par adhiktar modern applications mein istemal kiye jate hain.

Overall, Relational Model data organization aur data manipulation ko tabtak asan banata hai, jab tak ki data entities aur unke relationships structured aur logically defined ho. Relational databases widely used hote hain commerce, finance, healthcare, logistics, aur dusre domain mein.

Leave a Comment