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MongoDB

Documents, queries, updates, and aggregation — the database Theebug itself runs on.

Beginner

3 levels

01 — lesson1.js

easyInserting a Document

1const result = await users.[ ___ ]({ name: "Ada", age: 30 });

2console.log(result.insertedId);

Insert a single new user document into the collection

02 — lesson2.js

easyFinding Documents

1const user = await users.[ ___ ]({ name: "Ada" });

2console.log(user);

Find the single user document matching this filter

03 — lesson3.js

easyQuery Operators

1const adults = await users.find({ age: { [ ___ ]: 18 } }).toArray();

Find every user whose age is 18 or greater

Intermediate

2 levels

04 — lesson4.js

mediumUpdating Documents

1await users.updateOne({ name: "Ada" }, { [ ___ ]: { age: 31 } });

Update Ada's age to 31 using the correct update operator

05 — lesson5.js

mediumDeleting Documents

1await users.[ ___ ]({ name: "Ada" });

Delete the single user document matching this filter

Advanced

1 level

06 — lesson6.js

hardAggregation Pipeline

1const totals = await orders

3 { $group: { _id: "$userId", total: { [ ___ ]: "$amount" } } },

Sum each user's order amounts using the aggregation pipeline's group ope…

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