There should be , documents after restore. If everything works, you should see your username when you are redirected to the welcome page. Model Tree Structures with Materialized Paths. It is not an orphan. Return All Fields in Matching Documents: Limit Fields to Return from a Query: Build Old Style Indexes.

Enron was an American corporation that engaged in a widespread accounting fraud and subsequently failed. Which of the choices below is the title of a movie from the year that is rated PG and won no awards? When you are done removing the orphan images from the collection, there should be 90, documents in the images collection. Every image is supposed to be in an album, but there are orphan images that appear in no album. Limit Number of Elements in an Array after an Update: MongoDB Java Unknown

homework 2.2 mongodb java

Please use the Enron dataset you imported for the previous problem. In this problem you will update a document in the Enron dataset to illustrate your mastery of hhomework documents from the shell. Understanding the output of explain We perform the following query on the enron dataset: One patient may have dozens or even hundreds of documents in jvaa record collection. ObjectId “52c52addead11dc50″”type”: Model Data to Support Keyword Search. Remove all indexes from the collection Choice 5: Return a List of All Indexes.


[Solution] Week 2 : CRUD: MP: MongoDB for Developers

Start by using mongoimport to import your albums. In this problem you will calculate the number of people who live in a zip code in the US where the city starts with a digit.

Return All Fields in Matching Documents: The value must be unique 2.22 the inventory collection. You can use hasNext to check whether there is another result.

Java MongoDB Tutorial

First, let’s confirm your data is intact; the number of documents should be Newer Post Older Post Home. Limit Number of Elements in an Array after an Update: In this dataset, each document is an email message. There was one additional program that should have been downloaded in the project called hommework.

homework 2.2 mongodb java

ObjectId “52cdde87″”fname”: There is a dump of the video database included in the handouts for the “Creating Documents” lesson. Perform Two Phase Commits: Inspect a few of the documents to get a basic understanding of the structure. Suppose your have a collection fubar with the following indexes created: Manually Iterate the Cursor: Notes on validation The Python validation script requires the following python modules be installed on your computer: There is also a views directory which contains the templates for the project.


If everything is working properly, you should be able to start the blog by typing: For Single Rerod rank limit always 1.

homework 2.2 mongodb java

Build Indexes on Replica Sets. Build Old Style Indexes. MongoDB for Developers Homework 2.

MongoDB Java

Install MongoDB on your computer and run it on the standard port. Please query the video. You will need to fix that in a stage of the aggregation before doing your grouping and counting of sender, recipient pairs.

Which of the following statements are true about MongoDB replication. To create a cursor with the shell, put some documents into a collection, do a query on them, and assign the results to a local variable variables defined with “var” are local.