Current temporal modifications are modifications to the current rows of a temporal table.
The period of applicability of a current modification implicitly begins from the current time and extends indefinitely, represented by an ending period bound of UNTIL_CHANGED. Current modifications need not explicitly specify a period in the modification SQL. The CURRENT keyword causes the system to automatically apply the modification to those rows whose period of validity overlaps the current time.
A current modification to any column creates history rows in the temporal table.