EDP_EDP_EXTERNAL_PLANT_REPORT_U_$RUN_DATE.dat与 SELECT BYTES FROM USER_SEGMENTS WHERE SEGMENT_NAME = 'table_name_bad';与 SELECT NUM_ROWS FROM USER_TABLES WHERE TABLE_NAME = 'table_name_bad'; 及$RUN_DATE 如何将上面语句结果集拼接为复合的SELECT语句并将结果用空格隔开？

以下是将上述语句结果集拼接为复合的SELECT语句并将结果用空格隔开的示例代码：

SELECT 
    EDP_EDP_EXTERNAL_PLANT_REPORT_U_$RUN_DATE.dat || ' ' || BYTES || ' ' || NUM_ROWS AS result 
FROM 
    (SELECT 
         (SELECT COUNT(*) FROM USER_SEGMENTS WHERE SEGMENT_NAME = 'table_name_bad') AS BYTES, 
         (SELECT NUM_ROWS FROM USER_TABLES WHERE TABLE_NAME = 'table_name_bad') AS NUM_ROWS 
     FROM 
         dual) 
     CROSS JOIN 
         (SELECT TO_CHAR(SYSDATE, 'YYYYMMDD') AS $RUN_DATE FROM dual);

其中，EDP_EDP_EXTERNAL_PLANT_REPORT_U_$RUN_DATE.dat、table_name_bad和$RUN_DATE需要替换为实际的值。