DatabaseReel #28 · 4 Nov 2026

SQL vs NoSQL Roast Battle: kaunsa database kab?

SQL (relational) databases fixed schema, JOINs aur strong ACID transactions dete hain, isliye payments, orders aur inventory jaise data ke liye default choice hain. NoSQL (document, key-value) databases flexible schema aur horizontal scaling ke liye bane hain, par denormalized (duplicate) data consistency ka risk laata hai. Line ab dhundhli hai: MongoDB multi-document ACID transactions support karta hai, aur PostgreSQL JSONB columns mein flexible JSON data rakh sakta hai.

Links

PostgreSQL: Transactions BEGIN / COMMIT, all-or-nothing

PostgreSQL: JSON types (JSONB) SQL ke andar flexible data

MongoDB: Transactions multi-document ACID transactions

Aaj ye karo

Data ka shape fixed hai aur rishte zyada hain (users, orders, payments)? SQL se shuru karo.
Data ka shape baar baar badalta hai ya bahut bada write scale chahiye? NoSQL dekho.
Paisa ya inventory hai toh transaction zaroori: Postgres mein BEGIN ... COMMIT, MongoDB mein session ke saath transaction.
Dono chahiye? Postgres ka JSONB column aksar kaafi hota hai.

BEGIN; UPDATE accounts SET balance = balance - 100 WHERE id = 1; UPDATE accounts SET balance = balance + 100 WHERE id = 2; COMMIT;

Sources

PostgreSQL docs, MongoDB docs; 4 Nov 2026 ko check kiya.