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what is struts?

  struts is one web MVC based  framework  from " Apache s/w foundation "   using which we can design industry oriented mvc based web apps
   
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insert document in collection mongodb

 Insert document in collection Two types of insert Insert single records:  Insert multiple records Insert single records:    syntax:  db.collection.insertOne(    <document>,    {       writeConcern: <document>    } ) Example 1:  db.users.insertOne({"name":"ram","email":"ram@gmail.com"})  Example 2:  db.users.insertOne( [{"employee":{"name":"ram","email":"ram@gmail.com"}}] ) Insert multiple records:   syntax : db.Collection_name.insertMany( [<document 1>, <document 2>, …], {     writeConcern: <document>,     ordered: <boolean> }) Example:  db.users.insertMany([{"name":"ram","email":"ram@gmail.com"},{"name":"raju","email":"raju@gmail.com"}])
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Collection Shell Commands in MongoDB

Create Collection  Syntax: db.createCollection("Collection Name"); Example: db.createCollection("users"); Delete collection in Mongodb Shell Command db.collection.drop()  Find Collection in Mongodb Shell Command db.collection.find() Show all Collection in Mongodb Shell Command show collections Creat Collection in Mongodb Shell Command db.createCollection("users") Rename the Collection In Mongodb Shell Command db.collection.renameCollection()   Update the single document in MongoDB collections Shell Command db.collection.updateOne()  Updates all the documents in MongoDB collections that match the given query.  db.collection.updateMany() Replaces the first matching document in MongoDB collection db.collection.replaceOne()  Deletes the first document in Mongodb collection db.collection.deleteOne()  db.collection.deleteMany()
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