I was told to Find out which occupation has the greatest number of patients with conditionID=MC8 I dk how to do the greatest part..... Here my code right now
SELECT occupation
FROM Patient
WHERE EXISTS
(SELECT PatientID FROM PatientMedcon
Where conditionID=’MC8’)
GROUP BY occupation
HAVNG count(occupation) = (Select max(occupation)
From Patient
You should approach these types of queries using regular joins and then add additional factors. The following gets the count of patients for each occupation with that condition:
SELECT occupation, COUNT(*)
FROM Patient p JOIN
PatentMedcon pm
ON p.PatientId = pm.PatientId and
pm.conditionId = 'MC8'
GROUP BY occupation
ORDER BY COUNT(*) DESC;
If you want the top row, that depends on the database. It might be select top 1
, limit 1
at the end, fetch first 1 rows only
at the end, or even something else.
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