-- Copyright 2004-2022 H2 Group. Multiple-Licensed under the MPL 2.0,
-- and the EPL 1.0 (https://h2database.com/html/license.html).
-- Initial Developer: H2 Group
--

SELECT CONCAT_WS(NULL, NULL, 'a', NULL, 'b', NULL);
>> ab

SELECT CONCAT_WS('*', NULL, 'a', NULL, 'b', NULL);
>> a*b

SELECT CONCAT_WS('*', '', 'a', NULL, 'b', NULL);
>> *a*b

SELECT '[' || CONCAT_WS('a', NULL, NULL) || ']';
>> []
