HI专家，需要您帮助我解决oracle中的以下要求。
我有列的列表，根据型号列过滤器我需要知道其他列是否有任何重复值，如果是，那么它应该将注释列显示为列名+重复值（例如：具有重复值的Category_description）
如果任何列为空白，则应打印列名称为空（例如：父类别ID为空白值）。
数据是：
M_No CAT_DESC CAT_ID P_CAT_ID Comments
1 computer hardware 10 90
1 monitors 11 10
1 printers 12 10
1 harddisks 13 10 CAT_DESC duplicate
1 memory components 14 10
1 harddisks 15 10 CAT_DESC duplicate
1 keyboards, mouses 16 10
1 other peripherals 17 10
1 harddisks 19 10 CAT_DESC duplicate
2 office fur supplies 30 90
2 capitalizable assets 31 30
2 office daily use 32 30
2 manuals, other books 33 30 CAT_DESC, CAT_ID duplicate
2 manuals, other books 33 30 CAT_DESC, CAT_ID duplicate
3 computer hardware 90 P_CAT_ID is blank value
4 computer software 20 90
4 spreadsheet software 21 20
4 processing software 22 20
4 23 CAT_DESC, P_CAT_ID is blank
4 operating systems 24 20
4 software development 25 20
4 miscellaneous software 29 20