Agenda
- Traits
Agility，Scalability，high-performance
Free and open-source
NoSQL database
JSON-like
Document-oriented database（schema flexible）
- Document Database
A record in MongoDB is a document, which is a data structure composed of field and value pairs. MongoDB are similar to JSON objects.
- SQL to MongoDB Mapping Chart
The following table presents the various SQL terminology and concepts and the corresponding MongoDB terminology and concepts.
- Connect to MongoDB
MongoDB default port is 27017， and default local host is 127.0.0.1
MongoClient mongo
= new MongoClient ("hostname", 27017);
DB db = mongo.getDB("dataqueuenode");
DBCollection collection = db.getCollection("entity");
- MongoDB CRUD in java
BasicDBObject query = new BasicDBObject();
query.put("type" , "S2F");
query.put("subtype" , "SQL Orders");
query.put("state" , "disputed");
Query Document
collection.findone(DBObject o); // search one specific record
collection.find(DBObject o); //search all specific records
Remove Document
collection.remove(DBObject o); // remove specific records
Insert Document
collection.insert(DBObject arr); // insert record
Modify Document
collection.update(DBObject q , DBObject o ); //update record
* @param q the selection criteria for the update
* @param o the modifications to apply
- MongoDB command
Reference
doc: http://docs.mongodb.org/manual/core/crud-introduction
- One Shell for MongoDB
MongoVUE
MongoDB中条件操作符有：
- (>) 大于 - $gt
- (<) 小于 - $lt
- (>=) 大于等于 - $gte
- (<= ) 小于等于 - $lte
>db.testtable.find({age : {$gt : 22}})