Excuse me, Why & When use "index"?
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thearabbit commented
Excuse me, Why & When use "index"?
rjakobsson commented
Basically it is used to speed up queries. My recommendation is to enroll in the free MongoDb University if you want to learn more on indexes: https://university.mongodb.com/courses/M101JS/about .
thearabbit commented
Thanks, sorry I am late.