mysql 结果拼接字符串

<!--根据夹具id获取适用实验类型-->
<select id="getTestTypeByFixtureId" resultMap="NewResultMap" parameterType="java.lang.String">
    SELECT GROUP_CONCAT(DISTINCT(t.name)) as testTypeNames, GROUP_CONCAT(DISTINCT(t.id)) as testTypeIds
           FROM test_type t
           INNER JOIN fixture_test_type ft ON t.id = ft.test_type_id
           AND ft.fixture_id = #{fixture_id} AND t.del_status = 1
</select>

    SELECT GROUP_CONCAT(t.url) as urls
    FROM tbl_project_attachment t
		WHERE t.project_apply_id = 7