All sparse indexes are unique index, but not all unique indexes are sparse! There are situations where we want to…
We learnt how to create unique key/index using {unique: true} option with ensureIndex() method. Now lets see how we can…
We have learnt how to create a key/index so far - today lets learn how to create unique key/index in…
What's the use of the data in database, if we can't fetch it and display on a web page! Today's…