title: Can I search across collections in MongoDB?
body: <p>I am inserting my data into MongoDB and had 240 such files. Instead of inserting everything into one big collection, I was thinking of inserting the files as a collection by themselves. Is this a good idea if I do a lot of queries on a commonly indexed column? </p>
  
  <p>If so, how can I initiate a query to query all the collections in my database?</p>