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## Lab 4 - OracleDB
## 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
```