# SQL Exercise: Patients who have had a procedure costing over \$5,000

## SQL hospital Database: Exercise-37 with Solution

37. From the following table, write a SQL query to find those patients who have undergone a procedure costing more than \$5,000, as well as the name of the physician who has provided primary care, should be identified. Return name of the patient as "Patient", name of the physician as "Primary Physician", and cost for the procedure as "Procedure Cost".

Sample table: patient
```    ssn    |       name        |      address       |  phone   | insuranceid | pcp
-----------+-------------------+--------------------+----------+-------------+-----
100000001 | John Smith        | 42 Foobar Lane     | 555-0256 |    68476213 |   1
100000002 | Grace Ritchie     | 37 Snafu Drive     | 555-0512 |    36546321 |   2
100000003 | Random J. Patient | 101 Omgbbq Street  | 555-1204 |    65465421 |   2
100000004 | Dennis Doe        | 1100 Foobaz Avenue | 555-2048 |    68421879 |   3
```
Sample table: undergoes
```  patient  | procedure | stay |        date         | physician | assistingnurse
-----------+-----------+------+---------------------+-----------+----------------
100000001 |         6 | 3215 | 2008-05-02 00:00:00 |         3 |            101
100000001 |         2 | 3215 | 2008-05-03 00:00:00 |         7 |            101
100000004 |         1 | 3217 | 2008-05-07 00:00:00 |         3 |            102
100000004 |         5 | 3217 | 2008-05-09 00:00:00 |         6 |
100000001 |         7 | 3217 | 2008-05-10 00:00:00 |         7 |            101
100000004 |         4 | 3217 | 2008-05-13 00:00:00 |         3 |            103
```
Sample table: physician
``` employeeid |       name        |           position           |    ssn
------------+-------------------+------------------------------+-----------
1 | John Dorian       | Staff Internist              | 111111111
2 | Elliot Reid       | Attending Physician          | 222222222
3 | Christopher Turk  | Surgical Attending Physician | 333333333
4 | Percival Cox      | Senior Attending Physician   | 444444444
5 | Bob Kelso         | Head Chief of Medicine       | 555555555
6 | Todd Quinlan      | Surgical Attending Physician | 666666666
7 | John Wen          | Surgical Attending Physician | 777777777
8 | Keith Dudemeister | MD Resident                  | 888888888
9 | Molly Clock       | Attending Psychiatrist       | 999999999
```
Sample table: procedure
``` code |              name              | cost
------+--------------------------------+-------
1 | Reverse Rhinopodoplasty        |  1500
2 | Obtuse Pyloric Recombobulation |  3750
3 | Folded Demiophtalmectomy       |  4500
4 | Complete Walletectomy          | 10000
5 | Obfuscated Dermogastrotomy     |  4899
6 | Reversible Pancreomyoplasty    |  5600
7 | Follicular Demiectomy          |    25
```

Sample Solution:

``````SELECT pt.name AS " Patient ",
p.name AS "Primary Physician",
pd.cost AS " Procedure Cost"
FROM patient pt
JOIN undergoes u ON u.patient=pt.ssn
JOIN physician p ON pt.pcp=p.employeeid
JOIN PROCEDURE pd ON u.procedure=pd.code
WHERE pd.cost>5000;
``````

Sample Output:

```   Patient   | Primary Physician | Procedure Cost
------------+-------------------+----------------
John Smith | John Dorian       |           5600
Dennis Doe | Christopher Turk  |          10000
(2 rows)
```

Explanation:

The said query in SQL that selects the names of patients, their primary care physicians (PCPs), and the cost of any medical procedures undergone by the patient that cost more than 5,000.

The first JOIN statement joins the 'patient' and 'undergoes' tables based on the ssn and patient columns, the second JOIN statement joins the 'patient' and 'physician' tables based on the patient's pcp and employeeid columns. The third JOIN statement joins the 'procedure' and 'undergoes' tables based on the code and procedure columns.

The WHERE clause includes the results for only those medical procedures with a cost greater than 5,000.

## Practice Online

E R Diagram of Hospital Database:

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