Before the invention of SQL, people wrote software using VSAM files and navigational databases with extremely limited computing and memory resources and it worked.
That isn't the point, though. Some people, myself included, find that processing the data in a declarative language directly in the database makes your code simpler and less prone to bugs.
That isn't the point, though. Some people, myself included, find that processing the data in a declarative language directly in the database makes your code simpler and less prone to bugs.