How To Display Collections In Mongodb
To query data from mongodb collection you need to use mongodb s find method.
How to display collections in mongodb. It is similar to tables in mysql to store the records. This is possible because mongodb is a schema free database. A collection may store a number of documents. In a relational database like mysql a schema defines the organization structure of data in a database.
First select the database you want to view the collection. Use mydb show collections output. If you are not specifying these options you do not need to explicitly create the collection since mongodb creates new collections when you first store data for the. Learn the top 10 most common commands for mongodb beginners including the command to log into mongodb show all databases and select a database to work with.
Mongodb provides the db createcollection method to explicitly create a collection with various options such as setting the maximum size or the documentation validation rules. Mongodb list collection is all about storage for the document. A flag when set to true and used with nameonly. If we want to fetch all documents from the collection the following mongodb command can be used.
Tecadmin accounts mycol pproducts users. If you want to list the available collections in mongodb database all you need to do is select the mydb then run show collection command. To view the collection you need to select the one that you want to view. Mongodb show collection is a command from the mongodb shell that helps in listing the collections created in the current database.
Find method displays the documents in a non structured format but to display the results in a formatted way the pretty method can be used. Listcollections action on the database to run the command when access control is enforced. A collection may store documents those who are not same in structure. When both authorizedcollections and nameonly options are set to true the command returns only those collections for which the user has privileges.
A collection is analogous to a table of an rdbms. Mongodb show collection select your database and run show collections command to list available collections in mongodb database. In this chapter we will learn how to query document from mongodb collection. True that allows a user without the required privilege i e.