Notes

Author: bashlogs

Notes.txt

@@ -1,2 +1,342 @@
-# mongodb
-Practicing MongoDB
+---
+description: >-
+  In my MongoDB documentation, I am practicing various operations and commands
+  to interact with a MongoDB database named "school." Here's a breakdown of the
+  context for each section of my documentation
+---
+
+# MongoDB Documentation
+### In my MongoDB documentation, I am practicing various operations and commands to interact with a MongoDB database named "school." Here's a breakdown of the context for each section of my documentation
+
+## Connection:
+
+* Connection string: `mongosh "mongodb+srv://cluster0.k3uephw.mongodb.net/" --apiVersion 1 --username mayur`
+* Password: JE5lyxzuYC58XHWs
+
+## Database:
+
+* Show available databases: `show dbs`
+* Switch to the "school" database: `use school`
+* Create a collection named "students": `db.createCollection("students")`
+* Drop the "school" database: `db.dropDatabase()`
+
+## Insert:
+
+*   Insert a single document:
+
+    ```javascript
+    javascriptCopy codedb.students.insertOne({name: "Mayur Khadde", age: 30, gpa: 3.2})
+    ```
+
+
+*   Insert multiple documents:
+
+    ```javascript
+    javascriptCopy codedb.students.insertMany([
+      {name: "Patrick", age: 38, gpa: 1.5},
+      {name: "Sandy", age: 27, gpa: 4.0},
+      {name: "Gary", age: 18, gpa: 2.5}
+    ])
+    ```
+
+
+*   Insert a complex document:
+
+    ```javascript
+    javascriptCopy codedb.students.insertOne({
+      name: "Larry 123",
+      age: 32,
+      gpa: 2.8,
+      fullTime: true,
+      registerDate: new Date("2023-01-02"),
+      gradutionDate: null,
+      courses: ["Biology", "Chemistry", "Calculus"],
+      address: {
+        Street: "123 Fake St.",
+        city: "Bikini Bottom",
+        zip: 12345
+      }
+    })
+    ```
+
+## Find:
+
+*   Find all students, sorted by name in descending order:
+
+    ```javascript
+    javascriptCopy codedb.students.find().sort({name: -1})
+    ```
+
+
+*   Find all students, sorted by GPA in ascending order:
+
+    ```javascript
+    javascriptCopy codedb.students.find().sort({gpa: 1})
+    ```
+
+
+*   Find the first student:
+
+    ```javascript
+    javascriptCopy codedb.students.find().limit(1)
+    ```
+
+
+*   Find the student with the highest GPA:
+
+    ```javascript
+    javascriptCopy codedb.students.find().sort({gpa: -1}).limit(1)
+    ```
+
+
+*   Find a student by name:
+
+    ```javascript
+    javascriptCopy codedb.students.find({name: "Mayur"})
+    ```
+
+
+*   Find full-time students:
+
+    ```javascript
+    javascriptCopy codedb.students.find({fullTime: true})
+    ```
+
+
+*   Find all students, displaying only their names:
+
+    ```javascript
+    javascriptCopy codedb.students.find({}, {name: true})
+    ```
+
+
+*   Find all students, excluding the `_id` field, and displaying only their names:
+
+    ```javascript
+    javascriptCopy codedb.students.find({}, {_id: false, name: true})
+    ```
+
+## Update:
+
+*   Update "Gary" to be a full-time student:
+
+    ```javascript
+    javascriptCopy codedb.students.updateOne({ name: "Gary" }, { $set: { fullTime: true } })
+    ```
+
+
+*   Find "Gary" to confirm the update:
+
+    ```javascript
+    javascriptCopy codedb.students.find({name: "Gary"})
+    ```
+
+
+*   Update a document by its `_id`:
+
+    ```javascript
+    javascriptCopy codedb.students.updateOne({ _id: ObjectId("6547d516fa269bcad3447d35") }, { $set: { fullTime: false } })
+    ```
+
+
+*   Unset the "fullTime" field in a document:
+
+    ```javascript
+    javascriptCopy codedb.students.updateOne({ _id: ObjectId("6547d516fa269bcad3447d35") }, { $unset: { fullTime: "" } })
+    ```
+
+
+*   Update all students to be non-full-time:
+
+    ```javascript
+    javascriptCopy codedb.students.updateMany({}, { $set: { fullTime: false } })
+    ```
+
+
+*   Unset the "fullTime" field for a student named "Tushar":
+
+    ```javascript
+    javascriptCopy codedb.students.updateOne({ name: "Tushar" }, { $unset: { fullTime: "" } })
+    ```
+
+
+*   Find the "Tushar" student to confirm the update:
+
+    ```javascript
+    javascriptCopy codedb.students.find({ name: "Tushar" })
+    ```
+
+
+*   Update all students without a "fullTime" field to be full-time:
+
+    ```javascript
+    javascriptCopy codedb.students.updateMany({ fullTime: { $exists: false } }, { $set: { fullTime: true } })
+    ```
+
+
+*   Find the "Tushar" student again to confirm the update:
+
+    ```javascript
+    javascriptCopy codedb.students.find({ name: "Tushar" })
+    ```
+
+## Delete:
+
+*   Delete a single document by name:
+
+    ```javascript
+    javascriptCopy codedb.students.deleteOne({ name: "Tushar" })
+    ```
+
+
+*   Confirm that the "Tushar" student is deleted:
+
+    ```javascript
+    javascriptCopy codedb.students.find({ name: "Tushar" })
+    ```
+
+
+*   Delete all non-full-time students:
+
+    ```javascript
+    javascriptCopy codedb.students.deleteMany({ fullTime: false })
+    ```
+
+## Comparison Operator:
+
+*   Find students with names other than "Mayur":
+
+    ```javascript
+    javascriptCopy codedb.students.find({ name: { $ne: "Mayur" } })
+    ```
+
+
+*   Find students with ages less than or equal to 30:
+
+    ```javascript
+    javascriptCopy codedb.students.find({ age: { $lte: 30 } })
+    ```
+
+
+*   Find students with ages greater than or equal to 27:
+
+    ```javascript
+    javascriptCopy codedb.students.find({ age: { $gte: 27 } })
+    ```
+
+
+*   Find students with GPAs between 3 and 4:
+
+    ```javascript
+    javascriptCopy codedb.students.find({ gpa: { $gte: 3, $lte: 4 } })
+    ```
+
+
+*   Find students with names "Mayur" or "Gary":
+
+    ```javascript
+    javascriptCopy codedb.students.find({ name: { $in: ["Mayur", "Gary"] } })
+    ```
+
+
+*   Find students with names other than "Mayur" or "Gary":
+
+    ```javascript
+    javascriptCopy codedb.students.find({ name: { $nin: ["Mayur", "Gary"] } })
+    ```
+
+## Logical Operator:
+
+*   Find full-time students aged 22 or younger (AND condition):
+
+    ```javascript
+    javascriptCopy codedb.students.find({ $and: [{ fullTime: true }, { age: { $lte: 22 } }] })
+    ```
+
+
+*   Find students older than 30 (NOT condition):
+
+    ```javascript
+    javascriptCopy codedb.students.find({ age: { $not: { $gte: 30 } } })
+    ```
+
+
+*   Find non-full-time students or students aged 22 or younger (NOR condition):
+
+    ```javascript
+    javascriptCopy codedb.students.find({ $nor: [{ fullTime: true }, { age: { $lte: 22 } }] })
+    ```
+
+
+*   Find full-time students or students aged 22 or younger (OR condition):
+
+    ```javascript
+    javascriptCopy codedb.students.find({ $or: [{ fullTime: true }, { age: { $lte: 22 } }] })
+    ```
+
+## Index:
+
+*   Perform a linear search for a student named "Larry":
+
+    ```javascript
+    javascriptCopy codedb.students.find({ name: "Larry" }).explain("executionStats")
+    ```
+
+
+*   Create an index on the "name" field:
+
+    ```javascript
+    javascriptCopy codedb.students.createIndex({ name: 1 })
+    ```
+
+
+*   Perform the same search with the new index:
+
+    ```javascript
+    javascriptCopy codedb.students.find({ name: "Larry" }).explain("executionStats")
+    ```
+
+
+*   Get the list of indexes on the "students" collection:
+
+    ```javascript
+    javascriptCopy codedb.students.getIndexes()
+    ```
+
+
+*   Drop the "name" index:
+
+    ```javascript
+    javascriptCopy codedb.students.dropIndex("name_1")
+    ```
+
+## Collections:
+
+*   Show all collections in the current database:
+
+    ```javascript
+    javascriptCopy codeshow collections
+    ```
+
+
+*   Create a capped collection named "teacher" with specified options:
+
+    ```javascript
+    javascriptCopy codedb.createCollection("teacher", { capped: true, size: 10000000, max: 100, autoIndexId: false })
+    ```
+
+
+*   Create a regular collection named "courses":
+
+    ```javascript
+    javascriptCopy codedb.createCollection("courses")
+    ```
+
+
+*   Drop the "courses" collection:
+
+    ```javascript
+    javascriptCopy codedb.courses.drop()
+    ```
+
+Remember to keep your documentation up to date and organized for easy reference in the future.