Merge branch 'master' of github.com:kanmaytacker/fundamentals

database/README.md

@@ -23,7 +23,7 @@ Download the ER diagram from [here](media/student-er.drawio) and import it into
 
 ### Problem sets
 1. [**Simple - I**](https://leetcode.com/problems/big-countries/)
-2. [Simple - II](https://leetcode.com/problems/find-customer-referee//)
+2. [Simple - II](https://leetcode.com/problems/find-customer-referee/)
 3. [**Joins - I**](https://leetcode.com/problems/employees-earning-more-than-their-managers/)
 4. [Joins - II](https://leetcode.com/problems/combine-two-tables/)
 5. [**Aggregation - I**](https://leetcode.com/problems/duplicate-emails/)

database/notes/05-sql-primer-worksheet.md

@@ -2,12 +2,12 @@
 # Queries
 
 ## Insert queries
-1. Insert a row with your name and all the other fields
+1. Insert a row with your name and all the other fields in **students** table
 ```sql
     
 ```
 
-1. Insert a row with just mandatory fields
+2. Insert a row with just mandatory fields in **students** table
 ```sql
     
 ```
@@ -87,7 +87,7 @@
     ```sql
     
     ```
-15. Get all students without the first name `John` or last name `Mycroft`
+15. Get all students without the first name `John` or first name `Mycroft`
     
     ```sql
     
@@ -111,7 +111,7 @@
     ```sql
     
     ```
-20. Get all students in Jhansi and London
+20. Get all students from Jhansi and London
     
     ```sql
     
@@ -172,7 +172,7 @@
      
      ```
  
-2. Delete a multiple rows
+2. Delete multiple rows
  
      ```sql
      
@@ -188,4 +188,4 @@
 2. Get first name and last name of all students and their instructor names
     
     ```sql
-    ```
+    ```

database/notes/05-sql-primer.md

@@ -211,5 +211,5 @@ For example, we want to get the batch names of all the students along with their
 This can be achieved by using the following SQL query:
 
 ```sql
-SELECT s.first_name, s.last_name, b.batch_name FROM students s JOIN batches ON s.batch_id = b.id;
-```
+SELECT s.first_name, s.last_name, b.batch_name FROM students s JOIN batches b ON s.batch_id = b.id;
+```

database/notes/06-sql-joins-aggregation.md

@@ -33,7 +33,7 @@ For example, we want to get the batch names of all the students along with their
 This can be achieved by using the following SQL query:
 
 ```sql
-SELECT s.first_name, s.last_name, b.batch_name FROM students s JOIN batches ON s.batch_id = b.id;
+SELECT s.first_name, s.last_name, b.batch_name FROM students s JOIN batches b ON s.batch_id = b.id;
 ```
 
 ### Left Outer Join