Query transaction

Question

i am writing a stored procedure i have to put transaction in that as there are multiple quires .
create or replace
PROCEDURE usp_addAppointment_Mst
there i am passing 25 parameetrs
pAppid in number,
     pAppcode in VARCHAR,
     pAppdate in date,
     pEmpid in INT,
as
begin
1 query
INSERT INTO Appointment_Mst
     AppId, AppCode, AppDate, EmpId, DutyRosterId, FirstName, MiddleName, LastName...............
VALUES
pAppid, pAppcode, pAppdate, pEmpid, pDutyrosterid, pFirstname, pMiddlename, pLastname, .............
if 1 query runs fine then go to second query else roll back transaction
2 query
INSERT INTO Appointment_Dtls (AppDetailsId, AppId, SlotId,InsertedByUserID,InsertedON,InsertedMacName,InsertedMacID,InsertedIPAddress)
VALUES
(@pAppdetailsid, pAppid, pSlotid, pInsertedByUserID, pInsertedON,@pInsertedMacName,@pInsertedMacID,@pInsertedIPAddress)
if 2 query runs fine then go for 3 query else roll back transaction
3 query
     UPDATE Patient
     SET
     First_Name = pFirstname,
     Middle_Name = pMiddlename,
     Last_Name = pLastname,
     Gender = pSex,
     Age = pAge,
     Date_Of_Birth = pDOB,
WHERE PatientId = pPatientid
if 3 query runs fine then go for 4 query else roll back transaction
4 query
INSERT INTO BBDonorVisit
( VisitID, DonorID, DonorBBNo, VisitDate, VisitNo, VisitTime, BloodGroup, Weight, BloodPressureSys, Temperature )
VALUES ( v_pVisitid, v_pDonorid, v_pDonorbbno, v_pVisitdate, v_pVisitno, v_pVisittime, v_pBloodgroup, v_pVoluntarycardno, v_pDefer, v_pRejectionReason, v_pDeferReason, v_pPulse, v_pTemperature );
like wise some update quires are also there
end;
i have to put these in transaction my requirement is that if any one of the query fails it should rollback entire transaction
please somebody guide me in this thanks in advance

Answer 1

You can include all of your DML statements together.
If one statement, all subsequent transactions won't run and it get rollback.
If all executes successfully without errors, it will commit successfully.
below are some lines for your needs:
CREATE OR REPLACE PROCEDURE ....
BEGIN
1query;
2query;
3query;
4query;
COMMIT;
EXCEPTION
WHEN OTHERS THEN
ROLLBACK;
END;
Suresh.