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(*)

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3

TRUNCATE TABLE ggl_links;

Table truncated.

SELECT COUNT(*) FROM ggl_links;

COUNT(*)

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0