Example:
> db.stuff.save({\"foo\":\"bar\"}); > db.stuff.find({\"foo\":\"bar\"}).count(); 1 > db.stuff.find({\"foo\":\"BAR\"}).count(); 0
db.zipcodes.find({city : "NEW YORK"}); // Case-sensitive db.zipcodes.find({city : /NEW york/i}); // Note the 'i' flag for case-insensitivity