mongoDB: Lesson2 : Creating Collection & Dropping Collection.

Hey Guys,
The fun continued here with mongodb next topic, creating collections(tables in RDBMS) and inserting documents(rows in table in RDBMS).

#	Task	Syntax with Example
1	Collection	A grouping of MongoDB documents. A collection is the equivalent of an RDBMS table. A collection exists within a single database. Collections do not enforce a schema. Documents within a collection can have different fields. Typically, all documents in a collection have a similar or related purpose. http://docs.mongodb.org/manual/reference/glossary/#term-collection
2	Creating Collection Method -1 : By using createCollection method	Using db.createCollection(name,options) function Syntax: db.createCollection(<name>,<options>) In the above syntax <name> is the name of the collection & options are various other parameters like capped, size, max and etc.(Refer official documentation for this). Example 1: Just creating a collection Name > db; test > db.createCollection("myFirstCollection"); { "ok" : 1 } > show collections; myFirstCollection nettuts system.indexes > Example 2: Creating collection with along with document. > db.mySecondCollection.save({"firstName":"sadakar","lastName":"pochampall",ID:200}); WriteResult({ "nInserted" : 1 }) > db.mySecondCollection.save({"firstName":"dolly","lastName":"boray",ID:201}); WriteResult({ "nInserted" : 1 }) > db.mySecondCollection.find(); { "_id" : ObjectId("53fdbdbe268aa77e481c4a6c"), "firstName" : "sadakar", "lastName" : "pochampall", "ID" : 200 } { "_id" : ObjectId("53fdbde4268aa77e481c4a6d"), "firstName" : "dolly", "lastName" : "boray", "ID" : 201 } >
3	Method -2: By using insert method:	Insert method can be used in two ways. Create documents separately and insert them into collection. Create documents separately and insert them into collection. Example: > i={"firstName":"sadakar","lastName":"pochampalli",id:100}; { "firstName" : "sadakar", "lastName" : "pochampalli", "id" : 100 } > j={"firstName":"dolly","lastName":"boray",id:101}; { "firstName" : "dolly", "lastName" : "boray", "id" : 101 } > db.myFirstCollection.insert(i); WriteResult({ "nInserted" : 1 }) > db.myFirstCollection.insert(j); WriteResult({ "nInserted" : 1 }) > show collections; myFirstCollection nettuts system.indexes > db.myFirstCollection.find(); { "_id" : ObjectId("53fdbaad268aa77e481c4a6a"), "firstName" : "sadakar", "lastName" : "pochampalli", "id" : 100 } { "_id" : ObjectId("53fdbab2268aa77e481c4a6b"), "firstName" : "dolly", "lastName" : "boray", "id" : 101 } >
	References :	http://docs.mongodb.org/manual/tutorial/getting-started/ http://docs.mongodb.org/manual/reference/method/db.createCollection/ http://docs.mongodb.org/manual/reference/method/db.collection.insert/
4	Drop Collection	Syntax: db.<CollectionName>.drop(); Example: > db.myFirstCollection.drop(); true >

:-)