Basic Oracle Concepts and Programming Question:

If you want to delete all rows from a table, you have two options:

* Use the DELETE statement with no WHERE clause.
* Use the TRUNCATE TABLE statement.

The TRUNCATE statement is more efficient the DELETE statement. The tutorial exercise shows you a good example of TRUNCATE statement:

SELECT COUNT(*) FROM ggl_links;
COUNT(*)
----------
3

TRUNCATE TABLE ggl_links;
Table truncated.

SELECT COUNT(*) FROM ggl_links;
COUNT(*)
----------
0