Cursors

Static cursors
Dynamic cursors
Forward-only cursors
Keyset-driven cursors

Static cursors:
A static cursor always displays the result set as it was when the cursor was opened. Static cursors are always read-only.

Dynamic Cursors:
Dynamic cursors are the opposite of static cursors. Dynamic cursors reflect all changes made to the rows in their result set when scrolling through the cursor.

Forward-only Cursors:
A forward-only cursor does not support scrolling; it supports only fetching the rows serially from the start to the end of the cursor.

Keyset-driven Cursors:
The keyset is the set of the key values from all the rows that qualified for the SELECT statement at the time the cursor was opened