Write a query in SQL to find the name and medication for those patients who did not take any appointment

  • برمجة سي كيو ال sql

Write a query in SQL to find the name and medication for those patients who did not take any appointment.

 

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
physician |  patient  | medication |        date         | appointment | dose
-----------+-----------+------------+---------------------+-------------+------
         1 | 100000001 |          1 | 2008-04-24 10:47:00 |    13216584 | 5
         9 | 100000004 |          2 | 2008-04-27 10:53:00 |    86213939 | 10
         9 | 100000004 |          2 | 2008-04-30 16:53:00 |             | 5
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
 code |     name     |         brand         | description
------+--------------+-----------------------+-------------
    1 | Procrastin-X | X                     | N/A
    2 | Thesisin     | Foo Labs              | N/A
    3 | Awakin       | Bar Laboratories      | N/A
    4 | Crescavitin  | Baz Industries        | N/A
    5 | Melioraurin  | Snafu Pharmaceuticals | N/A

الأجوبة

SELECT t.name AS "Patient",
       p.name AS "Physician",
       m.name AS "Medication"
FROM patient t
JOIN prescribes s ON s.patient=t.ssn
JOIN physician p ON s.physician=p.employeeid
JOIN medication m ON s.medication=m.code
WHERE s.appointment IS NULL;

Sample Output:

  Patient   |  Physician  | Medication
------------+-------------+------------
 Dennis Doe | Molly Clock | Thesisin
(1 row)
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