MongoDB条件查询
1、查询集合中的所有记录db.users.find()
{ "_id" : ObjectId("528b1173613e3289197a6486"), "name" : "lihuai", "age" : 35, "status" : "A", "groups" : ["news","sports" ] }
{ "_id" : ObjectId("528b17ffef83cba2aee5bca9"), "name" : "yekai", "age" : 30, "status" : "A", "groups" : ["history","Math" ] }
{ "_id" : ObjectId("528b187eef83cba2aee5bcaa"), "name" : "lixunhuan", "age" : 40, "status" : "B", "groups" : ["music","Math" ] }
2、查询集合中的前两条记录
db.users.find().limit(2)
3、查询age==30的数据
db.users.find({age:30})
4、查询age>35的数据
db.user.find({age:{$gt:35}})
5、查询age>=35的数据
db.user.find({age:{$gte:35}})
6、
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