摘要: 查询表中学生年级大于20,如下: db.getCollection('student').find({'age':{'$gt':'20'}}) $lt < (less than ) $lte <= (less than or equal to ) $gt > (greater than ) $gte 阅读全文
posted @ 2018-11-13 09:42 割肉机 阅读(5382) 评论(0) 推荐(0) 编辑