## Lab 4 - OracleDB

### Verifying the existence of the previous labs' DB.
```sql
SQL> select table_name from user_tables;

TABLE_NAME
--------------------------------------------------------------------------------
ACCIDENT
CAR
OWNS
PARTICIPATED
PERSON
```

### Q1. Find the total number of people who owned cars that were involved in accidents in 2008.

Ans. 

Modifying the table to add required entry from 2008.
```sql

SQL> select * from accident;

REPORT_NUMBER ACCD_DATE LOCATION
------------- --------- --------------------------------------------------
            1 01-JAN-24 Delhi India
            3 29-FEB-24  India
            5 31-MAR-00  Gujrat India
           12 17-JUL-00  karnataka India
           10 01-JAN-08 Manipal India

SQL> update accident set ACCD_DATE='01-Jan-2008' where REPORT_NUMBER=1
  2  ;

1 row updated.

SQL> select * from accident;

REPORT_NUMBER ACCD_DATE LOCATION
------------- --------- --------------------------------------------------
            1 01-JAN-08 Delhi India
            3 29-FEB-24  India
            5 31-MAR-00  Gujrat India
           12 17-JUL-00  karnataka India
           10 01-JAN-08 Manipal India
```


```sql
SQL> select count(distinct Driver_ID#) from participated natural join accident where extract(year from accd_date)=2008;

COUNT(DISTINCTDRIVER_ID#)
-------------------------
                        1
```

### Q2. Find the number of accidents in which cars belonging to a specific model were involved.
```sql
SQL> select * from car;

REGNO                MODEL                                YEAR
-------------------- ------------------------------ ----------
ABCD0001             Celtos                                  3
EFGH2001             Ferrari                                32
DSDS0001             Urus                                    5
ABCD4001             Honda City                              1
HFSP5601             mini cooper                             7

SQL> select count(distinct driver_id#) from car natural join participated where model like 'Urus';

COUNT(DISTINCTDRIVER_ID#)
-------------------------
                        1
```