Fixes id.

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

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+
+# Queries
+
+## Insert queries
+1. Insert a row with your name and all the other fields
+```sql
+    
+```
+
+1. Insert a row with just mandatory fields
+```sql
+    
+```
+
+---
+
+## Select Queries
+1. Get all students
+
+    ```sql
+    
+    ```
+
+2. Get first and last name of all students
+
+    ```sql
+    
+    ```
+
+3. Get first name of all students with output column name as `Student Name`
+    
+    ```sql
+    
+    ```
+4. Get all unique addresses of all students
+        
+    ```sql
+    
+    ```
+5. Get all students with ID equal to 1
+    
+    ```sql
+    
+    ```
+6. Get all students with IQ greater than 150
+    
+    ```sql
+    
+    ```
+7. Get all students with IQ less than 100
+    
+    ```sql
+    
+    ```
+8. Get all students with IQ greater than 100 and less than150
+
+    ```sql
+    
+    ```
+9. Get all students with IQ greater than 100 or less than 150
+    
+    ```sql
+     
+    ```
+10. Get all students with first name `Tantia`
+    
+    ```sql
+    
+    ```
+11. Get all students with first name `Tantia` and last name `Tope`
+    
+    ```sql
+    
+    ```
+12. Get all students with first name `John` or first name `Mycroft`
+    
+    ```sql
+    
+    ```
+13. Get all students with name `John Watson` or `Mycroft Holmes`
+    
+    ```sql
+    
+    ```
+14. Get all students without the first name `John`
+    
+    ```sql
+    
+    ```
+15. Get all students without the first name `John` or last name `Mycroft`
+    
+    ```sql
+    
+    ```
+16. Get all students with first name starting with `T`
+    
+    ```sql
+    
+    ```
+17. Get all students with last name ending with `walker`
+    
+    ```sql
+    
+    ```
+18. Get all students with first name containing `T`
+    
+    ```sql
+    
+    ```
+19. Get all students with last name in the format `___walker`
+    ```sql
+    
+    ```
+20. Get all students in Jhansi and London
+    
+    ```sql
+    
+    ```
+21. Get all students which do not have a batch id
+    
+    ```sql
+    
+    ```
+22. Get the first 5 students
+    
+    ```sql
+    
+    ```
+23. Get the first 5 students sorted by IQ
+    
+    
+    ```sql
+    
+    ```
+24. Get the first 5 students sorted by IQ in descending order
+    
+    ```sql
+    
+    ```
+25. Get the first 5 students sorted by IQ in descending order and then by first name
+    
+    ```sql
+    
+    ```
+
+---
+
+## Update Queries
+
+1. Update a row
+
+    ```sql
+    
+    ```
+2. Update a row with a condition
+
+    ```sql
+    
+    ```
+
+3. Update multiple columns
+
+    ```sql
+    
+    ```
+
+## Delete Queries
+
+1. Delete a row with a condition
+ 
+     ```sql
+     
+     ```
+ 
+2. Delete a multiple rows
+ 
+     ```sql
+     
+     ```
+
+## Joining Queries
+
+1. Get first name and last name of all students and their batch names
+    
+    ```sql
+    
+    ```
+2. Get first name and last name of all students and their instructor names
+    
+    ```sql
+    ```