76 lines
2.1 KiB
Markdown
76 lines
2.1 KiB
Markdown
## Lab 4 - OracleDB
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### Verifying the existence of the previous labs' DB.
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```sql
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SQL> select table_name from user_tables;
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TABLE_NAME
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--------------------------------------------------------------------------------
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ACCIDENT
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CAR
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OWNS
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PARTICIPATED
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PERSON
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```
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### Q1. Find the total number of people who owned cars that were involved in accidents in 2008.
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Ans.
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Modifying the table to add required entry from 2008.
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```sql
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SQL> select * from accident;
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REPORT_NUMBER ACCD_DATE LOCATION
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------------- --------- --------------------------------------------------
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1 01-JAN-24 Delhi India
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3 29-FEB-24 India
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5 31-MAR-00 Gujrat India
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12 17-JUL-00 karnataka India
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10 01-JAN-08 Manipal India
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SQL> update accident set ACCD_DATE='01-Jan-2008' where REPORT_NUMBER=1
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2 ;
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1 row updated.
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SQL> select * from accident;
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REPORT_NUMBER ACCD_DATE LOCATION
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------------- --------- --------------------------------------------------
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1 01-JAN-08 Delhi India
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3 29-FEB-24 India
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5 31-MAR-00 Gujrat India
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12 17-JUL-00 karnataka India
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10 01-JAN-08 Manipal India
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```
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```sql
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SQL> select count(distinct Driver_ID#) from participated natural join accident where extract(year from accd_date)=2008;
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COUNT(DISTINCTDRIVER_ID#)
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-------------------------
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1
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```
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### Q2. Find the number of accidents in which cars belonging to a specific model were involved.
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```sql
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SQL> select * from car;
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REGNO MODEL YEAR
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-------------------- ------------------------------ ----------
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ABCD0001 Celtos 3
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EFGH2001 Ferrari 32
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DSDS0001 Urus 5
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ABCD4001 Honda City 1
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HFSP5601 mini cooper 7
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SQL> select count(distinct driver_id#) from car natural join participated where model like 'Urus';
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COUNT(DISTINCTDRIVER_ID#)
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-------------------------
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1
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```
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