1. What is NoSQL
A DB which has key-value paired and document based.
Doesn't use string based queries to fetch data
Cassandra is a distributed NoSQL DB
2. Difference between NoSQL and RDMBS
NoSQL is unstructured, high availability, cannot be queried by SQL, K-V parir, document base
RDMBS is structured, low availability, can use SQL QUERY, Data/Relational stored in dif tables
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