Provided by: postgresql-client-8.2_8.2.7-1_i386
TRUNCATE - empty a table or set of tables
TRUNCATE [ TABLE ] name [, ...] [ CASCADE | RESTRICT ]
TRUNCATE quickly removes all rows from a set of tables. It has the same
effect as an unqualified DELETE on each table, but since it does not
actually scan the tables it is faster. This is most useful on large
name The name (optionally schema-qualified) of a table to be
Automatically truncate all tables that have foreign-key
references to any of the named tables, or to any tables added to
the group due to CASCADE.
Refuse to truncate if any of the tables have foreign-key
references from tables that are not to be truncated. This is the
Only the owner of a table may TRUNCATE it.
TRUNCATE cannot be used on a table that has foreign-key references from
other tables, unless all such tables are also truncated in the same
command. Checking validity in such cases would require table scans, and
the whole point is not to do one. The CASCADE option can be used to
automatically include all dependent tables — but be very careful when
using this option, else you might lose data you did not intend to!
TRUNCATE will not run any user-defined ON DELETE triggers that might
exist for the tables.
Truncate the tables bigtable and fattable:
TRUNCATE TABLE bigtable, fattable;
Truncate the table othertable, and cascade to any tables that are
referencing othertable via foreign-key constraints:
TRUNCATE othertable CASCADE;
There is no TRUNCATE command in the SQL standard.