mongodb 比较集合内两个字段值是否一样 查询集合数据： { "_id" : ObjectId("599d5b198ead0e5e6f00619e"), "fields1" : 2000.0, "fields2" : 2000.0 } { "_id" : ObjectId("599d5b198ead0e5e6f0061a3"), "fields1" : 1000.0, "fields2" : 500.0 } find方法查询fields1 与 fields2字段值相同: db.test.find({ "$where": "this.fields1 =…