Tài liệu PL/SQL User’s Guide and Reference phần 4

Using Cursor FOR Loops
In most situations that require an explicit cursor, you can simplify coding by using a
cursor FOR loop instead of the OPEN, FETCH, and CLOSE statements. A cursor FOR
loop implicitly declares its loop index as a %ROWTYPE record, opens a cursor,
repeatedly fetches rows of values from the result set into fields in the record, and
closes the cursor when all rows have been processed.
Consider the PL/SQL block below, which computes results from an experiment,
then stores the results in a temporary table. The FOR loop index c1_rec is
implicitly declared as a record. Its fields store all the column values fetched from the
cursor c1. Dot notation is used to reference individual fields.