How to update the value of a column when a row is deleted

Hi,
My requirement is basically i have a table .Below is a sample data along with sample data
Column A Column B ColumnC
1 SAM 0
2 RAM 0
Now if i run a delete statement saying
delete from Table where ColumnA =1 then i want to see the value of ColumnC to be updated as 1.The row shouldnt be deleted however the value of ColumnC should be changed to 1.
Can someone please help me with any suggestions? I can create a trigger but i havent worked with triggers so not sure on how to use it.
Please let me know if i am unclear or if you need any details.
Thanks

As I understand what you need is an INSTEAD OF DELETE trigger like below
CREATE TRIGGER Trg_TableName
ON TableName
INSTEAD OF DELETE
AS
BEGIN
UPDATE t
SET ColumnC = 1
FROM TableName t
WHERE EXISTS (SELECT 1
FROM DELETED
WHERE ColumnA = t.ColumnA
END
this will set ColumnC to 1 and will not do an actual delete of the row.
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