How to delete an update field automatically

Question

Dear all,
I have a a local SQL server 2012 express version where I have a dedicated table which stored local ORDERS.
In this table named "SALESORDER" I have a Boolean field called Transfert. When an order is place, that field is set to FALSE.
Then I have an running NT service which pool every 15 s that SALESORDER table for new records where Transfert=FALSE.
Then for each records found, they are send to the cloud. Once a records get successfully send to the cloud, I need to set the Transfert field to TRUE.
Then what I need to do is having a trigger that when a record gets its Transfer field = True, I need to delete that record from local table because it has been successfully proceed.
How to do that efficiently ?
INFO : Just a remark that I am storing orders locally in order to delegate the sending cloud task to a different process for performance reason

Answer 1

Try below
Create table SALESORDER
orderid int,
Transfert varchar(10) default ('FALSE')
GO
IF OBJECT_ID ('SALESORDER_upd_deleteTransfert','TR') IS NOT NULL
DROP TRIGGER SALESORDER_upd_deleteTransfert;
GO
CREATE TRIGGER SALESORDER_upd_deleteTransfert ON SALESORDER
AFTER UPDATE
AS
IF EXISTS (SELECT *
FROM SALESORDER AS SO
JOIN inserted AS i
ON SO.orderid = i.orderid
WHERE i.Transfert = 'TRUE'
BEGIN
delete so
FROM SALESORDER AS SO
JOIN inserted AS i
ON SO.orderid = i.orderid
WHERE i.Transfert = 'TRUE'
END;
GO
INSERT INTO SALESORDER(orderid)
select 1 union all
select 2 union all
select 3
select * From SALESORDER
orderid Transfert
1 FALSE
2 FALSE
3 FALSE
update SALESORDER set Transfert= 'True' where orderid = 2
select * From SALESORDER
orderid Transfert
1 FALSE
3 FALSE
you can create trigger for this case, but i would recommend to delete the records while you are marking the record processed, or move to another table
Thanks
Saravana Kumar C