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As an example,either of these will work:
db.wands.insert({"name": "Dream Bender", "creator": "Foxmond"})
db.wands.insert({name: "Dream Bender", creator: "Foxmond"})
Which one will I use any why?
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Use the $in Operator to Match Values This query selects all documents in the inventory collection where the value of the quantity field is either 5 or 15. Although you can write this query using the $or operator, use the $in operator rather than the $or operator when performing equality checks on the same field.
Running SQL statements against a MongoDB collection. An SQL SELECT statement typically retrieves data from tables in a database, much like a mongo shell find statement retrieves documents from a collection in a MongoDB database.
The MongoDB $where operator is used to match documents that satisfy a JavaScript expression. A string containing a JavaScript expression or a JavaScript function can be pass using the $where operator.
MongoDB provides different types of comparison operators and less than operator ( $lt ) is one of them. This operator is used to select those documents where the value of the field is less than (<) the given value. You can use this operator in methods like, find() , update() , etc.
You can use quotes and never have to worry about when they are necessary.
When you run a query or command from the mongo shell interface it is being parsed by the shell's JavaScript interpreter.
Anything which isn't valid JavaScript will cause a syntax error.
For example, A collection or field name starting without an underscore or alpha character would have to be quoted.
So, either of these will work:
db.wands.insert({"name": "Dream Bender", "creator": "Foxmond"})
db.wands.insert({name: "Dream Bender", creator: "Foxmond"})
Also, this would work:
db.wands.insert({"3name": "Dream Bender", "creator": "Foxmond"})
But this won't work.
db.wands.insert({3name: "Dream Bender", creator: "Foxmond"})
So, I find it easier to be in the habit of using quotes so you don't have to remember the exceptions.
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