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compare data and update the table

Hi Team,

1. i am having 2 table to comapre the data with patient1 and patient2
fields have excatly same in both table,suppose having multiple data like 10 rows in both table

we have to check for current month only .
if exactly same patient records present ,then upd_date of patient1 table upadate with current date.

Patient1table : patient_id firstname lastname upd_date
patient2table: patient_id firstname lastname upd_date

plz help

Deepak Subburajan

Its simple. If I got you correctly, here you go,

UPDATE
   Patient1
SET
   upd_date = Getdate()
FROM
   Patient1 P1,
   Patient2 P2
WHERE
   P1.patient_id = P2.patient_id

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you also have mentioned as you want to do this only for the current month. Include the column in the WHERE clause. You are done.

Vikas Garg

HI,

Update patient2table
SET upd_date = GETDATE()
WHERE Month(upd_date) = Month(Getdate())
and patient_id  IN (Select patient_id  from Patient1table)

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Habib Pourfard

You could write:

UPDATE Patient1table 
SET upd_date = GETDATE()
FROM Patient1table P1 INNER JOIN Patient2table P2 ON P1.patient_id = P2.patient_id
AND P1.firstname = P2.firstname  
AND P1.lastname = P2.lastname 
AND P1.upd_date = P2.upd_date
WHERE DATEPART(m, P1.upd_date) = DATEPART(m, DATEADD(m, -1, getdate()))
AND DATEPART(yyyy, P1.upd_date) = DATEPART(yyyy, DATEADD(m, -1, getdate()))

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nicemanish

ASKER

Thanks for reply
a little bit add can we do also
"when we have a patient record in patient2, which is not present in patient1.i want to be copy that data in patient 1 as a new record"

ASKER CERTIFIED SOLUTION

Habib Pourfard

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nicemanish

ASKER

excellent