Update DBMS/SQL/Week7/writeup.md

DBMS/SQL/Week7/writeup.md

@@ -42,7 +42,7 @@ Driver_id: 1235 Name: Rohit Address: Banglalore India
 ```
 
 ### Q2. Create a trigger that updates a `total_damage` column in the `accident` table whenever a new entry is added to or removed from the participated field.`
-
+Trigger:
 ```SQL
 SQL> CREATE OR REPLACE TRIGGER update_total_damage
   2  AFTER
@@ -62,9 +62,11 @@ SQL> CREATE OR REPLACE TRIGGER update_total_damage
 
 Trigger created.
 ```
+Adding an identifier `total_damage`:
 ```sql
 SQL> ALTER TABLE ACCIDENT ADD total_damage NUMBER;
 ```
+Test case with Insertion:
 ```sql
 SQL> INSERT INTO
         PARTICIPATED (driver_id#, regno, report_number, damage_amount)
@@ -84,7 +86,9 @@ SQL> SELECT
 REPORT_NUMBER TOTAL_DAMAGE
 ------------- ------------
             1        15000
-
+```
+Test case with Deletion:
+```sql
 SQL> DELETE FROM PARTICIPATED
       WHERE
         driver_id# = '1235'