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Help with trigger
Posted by: Bryony Thompson
Date: April 23, 2012 04:35AM

Hello,

I am completely new to SQL and am trying to create a trigger to update a field when a field in another table is changed...

I have the following two tables with these fields in them...

PATIENTS
Patient_ID
Date_Of_Last_Appointment (Date)

APPOINTMENTS
Appointment_ID
Patient_ID
Date_Of_Appointment (Date)
Status

When a patient attends their appointment, the Status field is changed to "Arrived". When this happens I want the date of the appointment to be inserted into the "Date_Of_Last_Appointment" field for the appropriate patient in the Patients table.

I would really appreciate some help in writing this. I am afraid I haven't got anything at the moment as I have no clue where to even begin. Usually I try to write something first to get help on so sorry!

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