Create a trigger to update date when a new record is added SQL Server

Question

EDITEDIT: I have explained my problem incorrectly. The question in hand -

Create a trigger on the Appointment table that will update LastContactDate on the Patient table each time a new record is added to the Appointment table. The value of the LastContactDate should be the date the record is added.

How do you create a trigger to update LastContactDate column to record the date every time a new record is added to an Appointment table?

This is what i currently have.

CREATE TRIGGER tr_Appointment_AfterInsert
ON Appointment
AFTER INSERT
AS
BEGIN
    INSERT INTO Appointment
    SET LastContactDate = GETDATE()
    FROM Appointment o
    INNER JOIN Inserted i
        ON o.AppDate = i.AppDate
        AND o.AppStartTime = i.AppStartTime
END
    

Could you help fix this code?

Answer 1

this query should be what you are searching for.

CREATE TRIGGER tr_Appointment_AfterInsert
ON Appointment
AFTER INSERT
AS
BEGIN
    UPDATE p
    SET LastContactDate = GETDATE()
    FROM Inserted i
    INNER JOIN Patient p
        -- Here the condition between Patient and Appointment (Inserted has the same columns and the new row of Appointment)
        ON ...
END