Documentation → PostgreSQL 7.4

Supported Versions: Current (17) / 16 / 15 / 14 / 13

Development Versions: devel

Unsupported versions: 12 / 11 / 10 / 9.6 / 9.5 / 9.4 / 9.3 / 9.2 / 9.1 / 9.0 / 8.4 / 8.3 / 8.2 / 8.1 / 8.0 / 7.4 / 7.3 / 7.2 / 7.1

This documentation is for an unsupported version of PostgreSQL.
You may want to view the same page for the current version, or one of the other supported versions listed above instead.

PostgreSQL 7.4.30 Documentation
Prev	Fast Backward		Fast Forward	Next

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

Only the owner of a table may TRUNCATE it.

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.

Prev	Home	Next
START TRANSACTION	Up	UNLISTEN