mongodb where clause example

One. MongoDB Insert Document Insert () methodTo insert data into a MongoDB collection, you need to use the MongoDB Insert () or Save () method.GrammarThe basic syntax for the Insert () command is as follows:>db. Collection_name.insert

Recently MongoDB is frequently shot in the hack news. Many people are more claiming to hate Mongodb,david Mytton on his blog revealing many of the existing problems in MongoDB. But the hated one has the same many preferences, as a comeback: Russell

Original link http://www.cnblogs.com/zhangzili/p/4975080.htmlMongoDB knowledge points at a glance1. Start the MongoDB database:Go to the MongoDB installation directory and execute the following commandC:\Program

Insert Document: Insert () method To insert data into the MongoDB collection, you need to use the MongoDB Insert () or Save () method. Grammar: The basic syntax for the Insert () command is as follows: >db. Collection_name.insert

Find () methodTo query the collection data from MongoDB, you need to use the MongoDB find () method.GrammarThe basic find () method syntax is as follows>db. Collection_name. Find() The Find () method displays all the files in an unstructured

C # mongodb [Up],Overview MongoDB is a high-performance, open-source, non-pattern document-type database developed using C ++. It is a product between a relational database and a non-relational database. It has the most abundant functions and is

Find () methodTo query data from a MongoDB collection, you need to use MongoDB's find() method.Grammarfind()The basic syntax of the command is as follows:>db.COLLECTION_NAME.find(document)Shellfind()Method will display all documents in an

MongoDB basic operation learning notes Record the basic operations of MongoDB today. This is only the most basic operation, so it should be mastered. Database A database is a collection of physical containers. Each database has its own file system.

MongoDB update document Update () method The update () method is used to update an existing document. The syntax format is as follows: db.collection.update( , , { upsert: , multi: , writeConcern: }) Parameter description:

Transferred from: http://www.cnblogs.com/cswuyg/p/4355948.html1. Count Statistics result errorThis is because the distributed cluster is migrating data, which results in a count result value error and requires the use of aggregate pipeline to obtain