应该是你的LISTAGG 函数用错了,可以去查一下LISTAGG 函数的用法。LISTAGG 前应该还需要一个字段
SELECT
department_id,
LISTAGG(employee_name, ', ') WITHIN GROUP (ORDER BY employee_name) AS concatenated_names
FROM
employees
GROUP BY
department_id;
在这个示例中,LISTAGG 函数将每个 department_id 的 employee_name 值用逗号分隔连接起来。