Question

I have a table A having columns Family ID, Name, Addr. How I can find recently modified rows in the table? Is that can be done without adding any more column in the table?

Answer 1

No, SQL Server does not track when a row was added to a table or modified. You would need to do this by adding a column:

ALTER TABLE dbo.A ADD RowAdded DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP;

Of course this will set all existing rows to now, so it will only work for new rows going forward. If you want modified time also, you can add an additional column:

ALTER TABLE dbo.A ADD RowChanged DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP;

And keep it up to date with a trigger:

CREATE TRIGGER dbo.A_modified
ON dbo.A
FOR UPDATE 
AS
BEGIN
  UPDATE A SET RowChanged = CURRENT_TIMESTAMP
    FROM dbo.A as A INNER JOIN inserted AS i
    ON A.ID = i.ID;
END
GO