SQL Server row date last modified

Question

A colleague of mine says that SQL Server saves the date and time of last modification in a \"hidden column\" in each record. I am pretty sure that he said something wrong. C

Answer 1

As the others are hinting at, your colleague must be talking gibberish, or referring to something else. The on-disk structure for a record, or page for that sake, does not contain any references to the time of the last update. While you can find info regarding the last update at the object level, no such info is available at the record/row level.