MongoDB 数组查询
[root@sunrise16 bin]# ./mongo
MongoDB shell version: 2.0.0 connecting to: test
插入一个带有数组元素的文档 > db.food.insert({"fruit": ["apple", "banana", "peach"]}) > db.food.find() { "_id" : ObjectId("4ea6a4ef0b12b1d429b4057f"), "fruit" : [ "apple", "banana", "peach" ] }
查询数组元素中包含某个值的文档 > db.food.find({"fruit": "banana"}) { "_id" : ObjectId("4ea6a4ef0b12b1d429b4057f"), "fruit" : [ "apple", "banana", "peach" ] }
> db.food.find({"fruit": {"$all": ["banana"]}}) { "_id" : ObjectId("4ea6a4ef0b12b1d429b4057f"), "fruit" : [ "apple", "banana", "peach" ] }
查询匹配指定数组的文档。注意要完全相同，数量和顺序都不能有错，否则找不到
> db.food.find({"fruit": ["banana"]}) > db.food.find({"fruit": ["apple", "banana", "peach"]}) { "_id" : ObjectId("4ea6a4ef0b12b1d429b4057f"), "fruit" : [ "apple", "banana", "peach" ] } > db.food.find({"fruit": ["banana", "apple", "peach"]})
查询数组元素中包含多个指定值的文档，全部包含，顺序无关
> db.food.find({"fruit": {"$all": ["banana", "apple", "peach"]}}) { "_id" : ObjectId("4ea6a4ef0b12b1d429b4057f"), "fruit" : [ "apple", "banana", "peach" ] }
查询包含多个值之一的文档
> db.food.find({"fruit":["banna","cherry"]}) > db.food.find({"fruit":{"$all":["banna","cherry"]}}) > db.food.find({"fruit":{"$in":["banna","cherry"]}})
查询指定长度的数组。但不能查询指定长度范围的数组
> db.food.find({"fruit": {"$size": 3}}) { "_id" : ObjectId("4ea6a4ef0b12b1d429b4057f"), "fruit" : [ "apple", "banana", "peach" ] } > db.food.find({"fruit": {"$size": 2}}) > db.food.find({"fruit": {"$size": 4}})
模糊查询：
db.collname.find({"actors.name":/Catterfeld/i}, {"tag":1,"_id":1,"actors":1})
参考推荐：