Searching for documents

• Searching for items with greater than length:

  db.getCollection('messages').find( {$where: "this.msg.length > 5"})

• Searching for text with wildcards around it:

  db.getCollection('messages').find({msg: /below/})

• All together:

db.getCollection('messages').find( {$where: "this.msg.length > 5", msg: /below /, incoming: true})

Lots of extra good examples here: https://docs.mongodb.com/manual/reference/sql-comparison/