将以下sql语句中wm_concat 改成listagg SELECT t1.*, t2.P_USER_NAME CREATE_NAME, t3.r_id FROM ( SELECT P_ID, ORG_ID, P_USER_NAME, LOGIN_ID, LOGIN_PWD, P_USER_TYPE, CREATE_ID, DEL_FLAG, CREATE_TIME, MODIFY_ID, MODIFY_TIME, school_rs_id FROM T_XT_ORG_USER WHERE p_id = #{userId} ) t1 LEFT JOIN T_XT_ORG_USER t2 ON t1.p_id = t2.p_id LEFT JOIN ( SELECT p_id, wm_concat (r_id) AS r_id FROM t_xt_role_users t3 GROUP BY p_id ) t3 ON t1.p_id = t3.p_id

可以使用Oracle官方支持的LISTAGG函数来替换wm_concat函数。LISTAGG函数与wm_concat函数类似，也可以将多个行连接成一个字符串，但是它是Oracle官方支持的函数，使用更加稳定可靠。将上述的SQL语句中的wm_concat函数替换为LISTAGG函数，可以这样写：

SELECT t1.*, t2.P_USER_NAME CREATE_NAME, t3.r_id 
FROM 
( 
    SELECT P_ID, ORG_ID, P_USER_NAME, LOGIN_ID, LOGIN_PWD, P_USER_TYPE, 
           CREATE_ID, DEL_FLAG, CREATE_TIME, MODIFY_ID, MODIFY_TIME, school_rs_id 
    FROM T_XT_ORG_USER 
    WHERE p_id = #{userId} 
) t1 
LEFT JOIN T_XT_ORG_USER t2 ON t1.p_id = t2.p_id 
LEFT JOIN 
( 
    SELECT p_id, LISTAGG(r_id, ',') WITHIN GROUP (ORDER BY r_id) AS r_id 
    FROM t_xt_role_users t3 
    GROUP BY p_id 
) t3 ON t1.p_id = t3.p_id

这里使用了LISTAGG函数来替换了wm_concat函数，同时使用了WITHIN GROUP子句指定了连接多个值时使用的分隔符。注意，使用LISTAGG函数时需要指定WITHIN GROUP子句，否则会报错。