TRUNCATE
Name
TRUNCATE -- empty a table
Synopsis
TRUNCATE [ TABLE ] name
Description
   TRUNCATE quickly removes all rows from a
   table. It has the same effect as an unqualified
   DELETE but since it does not actually scan the
   table it is faster. This is most useful on large tables.
  
Parameters
- name
-       The name (optionally schema-qualified) of the table to be truncated.
      
Notes
   TRUNCATE cannot be used if there are foreign-key references
   to the table from other tables.  Checking validity in such cases would
   require table scans, and the whole point is not to do one.
  
   TRUNCATE will not run any user-defined ON
   DELETE triggers that might exist for the table.
  
Examples
   Truncate the table bigtable:
TRUNCATE TABLE bigtable;
  
Compatibility
   There is no TRUNCATE command in the SQL standard.