operaciones mongo-index

db.getCollection("ny_room_browse_record").createIndex({wechat_user_space_id:1}, {background: true});
db.getCollection("ny_room_browse_record").createIndex({room_id:1}, {background: true});


db.getCollection("ny_room_browse_record").getIndexes();

db.getCollection("ny_room_browse_record").dropIndex("room_id_1");
db.getCollection("ny_room_browse_record").dropIndex("room_id_1_wechat_user_space_id_1");
db.getCollection("ny_room_browse_record").dropIndex("wechat_user_space_id_1")