Insert mode   The data in the buffer is added to the table as a new row when the insert method is called.

Update mode   The data in the buffer replaces the current row when the update method is called.

Find mode   Used to locate a row whose value exactly matches the data in the buffer when one of the find methods is called.

Lookup mode   Used to locate a row whose value matches or is greater than the data in the buffer when one of the lookup methods is called.