Redshift - GRANT

Grant all on schema to user_name:

GRANT ALL
ON SCHEMA schema_name
TO user_name;
GRANT ALL PRIVILEGES
ON ALL TABLES IN SCHEMA schema_name
TO user_name;

-- Grant Usage permission to Read-Only Group to specific Schema
GRANT USAGE ON SCHEMA "ro_schema" TO GROUP ro_group;
-- Grant Select permission to Read-Only Group to specific Schema
GRANT SELECT ON ALL TABLES IN SCHEMA "ro_schema" TO GROUP ro_group;

Change owner:

ALTER TABLE
<schema>.<table> OWNER TO <user>;