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‎QUERIES.md

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# MongoDB Queries Practice
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Write a MongoDB query to:
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1. Display all the documents in the restaurants collection.
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```
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Paste your solution here
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```
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2. Display the fields restaurant_id, name, borough and cuisine for all the documents in the collection.
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```
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Paste your solution here
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```
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3. Display the fields restaurant_id, name, borough and cuisine, but exclude the field _id for all the documents in the collection.
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```
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Paste your solution here
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```
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4. Display the fields restaurant_id, name, borough and zip code, but exclude the field _id for all the documents in the collection.
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```
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Paste your solution here
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```
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5. Display all the restaurants which are in the borough Bronx.
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```
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Paste your solution here
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```
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6. Display the first 5 restaurants which are in the borough Bronx.
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```
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Paste your solution here
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```
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7. Display the next 5 restaurants after skipping first 5 which are in the borough Bronx.
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```
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Paste your solution here
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```
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8. Find the restaurants who achieved a score more than 90.
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```
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Paste your solution here
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```
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9. Find the restaurants that achieved a score, more than 80 but less than 100.
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```
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Paste your solution here
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```
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10. Find the restaurants which are located in latitude value less than -95.754168.
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```
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Paste your solution here
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```
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11. Find the restaurants that do not prepare any cuisine of 'American' and their grade score is more than 70 and latitude less than -65.754168.
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```
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Paste your solution here
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```
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12. Find the restaurants which do not prepare any cuisine of 'American' and achieved a score more than 70 and are located in the longitude less than -65.754168.
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Note : Do this query without using $and operator.
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```
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Paste your solution here
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```
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13. Find the restaurants which do not prepare any cuisine of 'American' and achieved a grade point 'A' and does not belong to the borough Brooklyn. The document must be displayed according to the cuisine in descending order.
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```
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Paste your solution here
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```
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14. Find the restaurant_id, name, borough and cuisine for those restaurants which contain 'Wil' as first three letters in its name.
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```
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Paste your solution here
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```
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15. Find the restaurant_id, name, borough and cuisine for those restaurants which contain 'ces' as last three letters in its name.
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```
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Paste your solution here
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```
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16. Find the restaurant_id, name, borough and cuisine for those restaurants which contain 'Reg' as three letters somewhere in its name.
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```
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Paste your solution here
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```
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17. Find the restaurants which belong to the borough Bronx and prepare either American or Chinese cuisine.
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```
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Paste your solution here
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```
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18. Find the restaurant_id, name, borough and cuisine for those restaurants which belong to the boroughs Staten Island or Queens or Bronx or Brooklyn.
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```
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Paste your solution here
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```
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19. Find the restaurant_id, name, borough and cuisine for those restaurants which don't belong to the boroughs Staten Island or Queens or Bronx or Brooklyn.
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```
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Paste your solution here
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```
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20. Find the restaurant_id, name, borough and cuisine for those restaurants which achieved a score that is not more than 10.
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```
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Paste your solution here
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```
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21. Find the restaurant_id, name, borough and cuisine for those restaurants which either prepare dishes except 'American' and 'Chinese' or has a name which begins with the letters 'Wil'.
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```
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Paste your solution here
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```
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22. Find the restaurant_id, name, and grades for those restaurants which achieved an A grade and scored 11 on the date "2014-08-11T00:00:00Z" among many of survey dates.
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```
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Paste your solution here
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```
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23. Find the restaurant_id, name and grades for those restaurants where the 2nd element of grades array contains a grade of "A" and score 9 on an ISODate "2014-08-11T00:00:00Z".
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```
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Paste your solution here
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```
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24. Find the restaurant_id, name, address and geographical location for those restaurants where 2nd element of coord array contains a value which is more than 42 and upto 52.
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```
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Paste your solution here
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```
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25. Arrange the name of the restaurants in ascending order along with all the columns.
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```
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Paste your solution here
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```
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26. Arrange the name of the restaurants in descending along with all the columns.
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```
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Paste your solution here
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```
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27. Arrange the restaurants in ascending order of cuisines and descending order of boroughs.
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```
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Paste your solution here
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```
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28. Check whether all the resturant addresses contain the street or not.
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```
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Paste your solution here
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```
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29. Display all documents in the restaurants collection where the coord field value is a Double.
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```
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Paste your solution here
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```
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30. Display the restaurant_id, name and grades for those restaurants which have a grade divisible by 7.
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```
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Paste your solution here
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```
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31. Find the restaurant name, borough, longitude and latitude and cuisine for those restaurants which contain 'mon' as three letters somewhere in its name.
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```
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Paste your solution here
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```

‎README.md

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# curriculum-backend-mongodb-queries-practice
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MongoDB Queries Practice
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# MongoDB Queries Practice
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The objectives of this assignment are:
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1. Practicing MongoDB queries on a local database
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2. Learning to query MongoDB collections directly before implementing the same in CRUD APIs
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## Setup
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Unlike the SQL assignment, this time we'll be working with a local database. So we will need to complete the local setup before we begin.
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### Install MongoDB
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Let's start by installing MongoDB on our local environments. Follow [these instructions on the MongoDB documentation](https://docs.mongodb.com/manual/installation/) to download and install MongoDB as per your OS.
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You can also [follow these instructions from the Microsoft documentation](https://docs.microsoft.com/en-us/windows/wsl/tutorials/wsl-database) if you are using WSL on your machine.
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**NOTE** : Make sure to install the *Community Edition of MongoDB* and check that the version being installed is MongoDB 5.0, which is the latest release.
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### Verify your installation
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After following the installation instructions, run the following command:
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```
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mongod --version
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```
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You should see an output similar to this:
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```
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db version v5.0.3
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Build Info: {
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"version": "5.0.3",
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"gitVersion": "657fea5a61a74d7a79df7aff8e4bcf0bc742b748",
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"modules": [],
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"allocator": "system",
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"environment": {
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"distarch": "x86_64",
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"target_arch": "x86_64"
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}
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}
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```
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This confirms that we have installed MongoDB version 5.0.
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### Run MongoDB
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For Linux, run the command to start running the MongoDB service:
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```
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sudo systemctl start mongod
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```
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Verify that MongoDB has started successfully by running the command:
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```
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sudo systemctl status mongod
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```
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For MacOS, run the command to start running the MongoDB service:
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```
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brew services start [email protected]
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```
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Verify that MongoDB has started successfully by running the command:
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```
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brew services list
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```
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### Prepare local database
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To begin using MongoDB, connect the Mongo shell to the running instance simply by running the command: `mongosh`
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It should show connection information and open a prompt looking like: `test>`
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By default the local MongoDB setup includes a database called `test`. You can verify this now by running the command `db` and it should print the name of the current database which is `test`.
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Let's create a new database called `practice`. Run this command: `use practice`. You should get an output `switched to db practice` and the prompt should change to `practice>`. This means we are now ready to use our new database.
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If we now run the command `show collections` we can see that there are currently no collections on our database. On this assignment repo, you will find a file called `restaurants.json` which is a collection of restaurant data. Let's load this collection into our database. Open a new terminal window and run this command:
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```
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mongoimport --db practice --collection restaurants --drop --file /Users/shrreya/Desktop/Projects/ReCoded/curriculum-backend-mongodb-queries-practice/restaurants.json
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```
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The output should mention:
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```
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3772 document(s) imported successfully
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```
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Now if we return to the terminal window running Mongo shell and run `show collections` again we will see that our database now has a collection called `restaurants`.
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Let's run a query to look at the first document in the collection:
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```
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db.restaurants.findOne()
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```
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If you see all the details of the first restaurant, you have completed the setup successfully!
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Looking at this first document, you should be able to understand the document model.
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```
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{
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_id: ObjectId,
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address: Object {
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building: String,
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coord: Array of numbers,
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street: String,
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zipcode: String
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},
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borough: String,
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cuisine: String,
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grades: Array of objects {date: Date, grade: String, score: Number},
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name: String,
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restaurant_id: String
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}
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```
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If you want to exit the Mongo shell, you can just type the command: `exit`
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## Practice Time
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Let's perform some queries on our restaurants collection now. In this assignment repo, you will find another markdown file called `QUERIES.md`. In this file, we have listed many practice queries for you. Go through the questions one by one and try to execute the queries on your Mongo shell.
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You can keep the MongoDB documentation open on your browser to help you with the queries.
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As you finish executing your queries, paste the solutions in the provided space inside markdown code blocks syntax below each query statement.
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## Submission
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Once you're ready to submit the assignment, follow these steps on your terminal:
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1. Stage your changes to the `QUERIES.md` file to be committed: `git add QUERIES.md`
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2. Commit your final changes: `git commit -m "solve assignment"`
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3. Push your commit to the main branch of your assignment repo: `git push origin main`
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After your changes are pushed, return to this assignment on Canvas for the final step of submission.
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## Conclusion
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Now that we have practiced performing queries on a MongoDB database, we are ready for module 3 where we will learn to build a CRUD API using Express.js and a MongoDB ODM.

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