SQL or Structured Query Language is a language that we are using to manipulate relational databases. in sql databases data is stored in multiple tables according to a schema. first relational database created on 1970s by an IBM Researcher using SESQL.

both of thees systems has their own advantages and disadvantages, In order for a SQL Database to be more effective,input data needs to be well structured and consistent. if we have a well defined schema in our SQL Database it will also help us to reduce data redundancy. therefor SQL is much better for a system that has constant and unchanging data. if your requirements are not clear at the beginning of the system (if you are not sure about what data your gonna store in your database) NoSQL system will be more suitable for you. because NoSQL databases doesn't need consistent data. and if we also compare the scalabilty of thees two systems NoSQL clearly wins because NoSQL databases are horizontally scalable unlike SQL databases NoSQL Databases (which are vertically salable)  can handle more traffic by sharing or adding additional servers.   

Conclusion