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

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

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

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