MongoDb 常用命令 crud

查询

db.testCo2.find();

db.testCo2.findOne();

db.testCo2.find().limit(1);

带条件

db.testCo2.find({"name":"cgh21"});

db.testCo2.find({name:/cgh/}); //like ‘%123%’

范围查询

db.testCo2.find({"$and":[{age:{"$lt":30}},{age:{"$gt":25}}]});

分页 从skip 条记录开始 (index 同数组)

db.testCo2.find().skip(1).limit(2); 

db.testCo2.find().sort({"age":1}).skip(50).limit(5);

count

db.testCo2.find().count();

db.testCo2.find({"age":{"$gt":33}}).count();

db.testCo2.count({"age":{"$lt":80}});

排序

db.testCo2.find().sort({"age":1}); 1升序-1降序（后面-前面）

多字段

db.testCo2.find({"$and":[{age:22},{name:"cgh12"}]});或$or

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insert

db.testCo2.insert({"name":"cgh22","age":22});

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remove

db.testCo2.remove({"name":"cgh22"});

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update

db.testCo2.update({"name":"cgh22"},{"$set":{"age":22}},false,true);

db.testCo2.update({"name":"cgh22"},{"$push":{"add_cloumn":"rand_str"}}); //新增字段add_cloumn

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查询修改

db.testCo2.findAndModify({

query:{age:{$gte:88}},

update:{$set:{name:"cgh"},$inc:{age:2}}

});

db.runCommand({findandmodify:”testCo2”,

query:{age:{$gte:88}},

update:{$set:{name:"cgh"},$inc:{age:2}}

});