We help IT Professionals succeed at work.

SQL Query--is not excluding a segment of my data

CMCITD
CMCITD asked
on
88 Views
Last Modified: 2017-03-29
I have the following code;

select distinct pt.person_id, p.last_name, p.first_name, p.address_line_1, p.city, p.state, p.zip from 
patient_ pt
INNER JOIN vital_signs_ vs ON vs.person_id = pt.person_id
INNER JOIN patient_problems pp ON pp.person_id = pt.person_id
INNER JOIN lab_results_obx lr ON lr.person_id = pt.person_id
INNER JOIN person p on p.person_id = pt.person_id
where pt.age >= 18 AND vs.BMI_calc >= 22 
and ((lr.obs_id like '25000000^GLUCOSE^' and CAST(lr.observ_value  AS decimal)>100) OR (lr.obs_id like '%FM HEM A1C^HEMOGLOBIN A1C^I%')  
and NOT EXISTS (select NULL from patient_problems p1 where (  description  like 'Diabetes%')
AND pt.person_id = p1.person_id))
order by p.last_name desc

Open in new window


When I check my data--everythings appears correct, except for this;

and NOT EXISTS (select NULL from patient_problems p1 where (  description  like 'Diabetes%')
AND pt.person_id = p1.person_id))

Open in new window


I have patients showing up that have Diabetes listed in their patient problem table.  The exact name of the patient_problem is 'Diabetes Type II' so the like statement should be catching it.

  I had posted this previously and after checking data, thought it was clean--however after I went 20+ names in diabetic patients started showing up.  Thanks!
Comment
Watch Question

lcohanDatabase Analyst
CERTIFIED EXPERT

Commented:
I believe that's due to NULL comparison which doesn't work like that - please try updated code below:

select distinct pt.person_id, p.last_name, p.first_name, p.address_line_1, p.city, p.state, p.zip
from patient_ pt
INNER JOIN vital_signs_ vs ON vs.person_id = pt.person_id
INNER JOIN patient_problems pp ON pp.person_id = pt.person_id
INNER JOIN lab_results_obx lr ON lr.person_id = pt.person_id
INNER JOIN person p on p.person_id = pt.person_id
where pt.age >= 18 AND vs.BMI_calc >= 22
      and ((lr.obs_id like '25000000^GLUCOSE^' and CAST(lr.observ_value  AS decimal)>100) OR (lr.obs_id like '%FM HEM A1C^HEMOGLOBIN A1C^I%')  
      and NOT EXISTS (select person_id from patient_problems p1 where (  description  like 'Diabetes%')
      AND pt.person_id = p1.person_id))
order by p.last_name desc

Author

Commented:
Ok--tried that code---same patients are still appearing
Database Analyst
CERTIFIED EXPERT
Commented:
This problem has been solved!
(Unlock this solution with a 7-day Free Trial)
UNLOCK SOLUTION

Author

Commented:
Sorry was in a clinic in the last couple of days, thanks so much!

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions