Now don't need to scan all documents to find your keyword, search engine creates special data structure to store every position of every word . It allows you to easily find all the documents which contain a particular word. It's called inverted index.
#trydb#searching#database
It turns out the first databases were not relational type, but graph-like structure of linked nodes. Our article about DB's history: https://t.co/n0q9KuaBUF
#db#databases#trydb#dbaas#History