Note that the FORWARD and BACKWARD keywords are
The SQL92 syntax is also supported, specified
in the second form of the command. See below for details
on compatibility issues.
Updating data in a cursor is not supported by
because mapping cursor updates back to base tables is
not generally possible, as is also the case with VIEW updates.
users must issue explicit UPDATE commands to replace data.
Cursors may only be used inside of transactions because
the data that they store spans multiple user queries.
to change cursor position.
will define a cursor.
for further information about transactions.