TRUNCATE

This page documents the preview version (v2.21). Preview includes features under active development and is for development and testing only. For production, use the stable version (v2024.1). To learn more, see Versioning.

Synopsis

Use the TRUNCATE statement to remove all rows from a specified table.

Syntax

Diagram

TRUNCATETABLEtable_name

Grammar

truncate ::= TRUNCATE [ TABLE ] table_name;

Where

  • table_name is an identifier (possibly qualified with a keyspace name).

Semantics

  • An error is raised if the specified table_name does not exist.

Examples

Truncate a table

ycqlsh:example> CREATE TABLE employees(department_id INT,
                                      employee_id INT,
                                      name TEXT,
                                      PRIMARY KEY(department_id, employee_id));

ycqlsh:example> INSERT INTO employees(department_id, employee_id, name) VALUES (1, 1, 'John');

ycqlsh:example> INSERT INTO employees(department_id, employee_id, name) VALUES (1, 2, 'Jane');

ycqlsh:example> INSERT INTO employees(department_id, employee_id, name) VALUES (2, 1, 'Joe');

ycqlsh:example> SELECT * FROM employees;

 department_id | employee_id | name
---------------+-------------+------
             2 |           1 |  Joe
             1 |           1 | John
             1 |           2 | Jane

Remove all rows from the table.

ycqlsh:example> TRUNCATE employees;

ycqlsh:example> SELECT * FROM employees;

 department_id | employee_id | name
---------------+-------------+------

See also