Oracle查詢幫助 - 子查詢分組

Question

我有表下面的列和數據條目（樣品）

EID ROW_NUM ROW_VALUE 
SM  1   E 
SM  2   E 
PM  2   E 
SM  3   E 
AM  3   S 
PM  3   E 
SM  4   E 
AM  4   S 
SM  5   S 
AM  5   E 
PM  5   E 
SM  6   S 
AM  6   E 
PM  6   E 
NM  6   S 

我不得不組由ROW_NUM &刪除記錄匹配於下列組合（精確）

1. SM = E AND PM = E， 這應該刪除與row_num = 2相關的行& retain row_num = 3。雖然它包含這個組合 它不完全匹配。
2. SM = S AND AM = E且PM = E， 這應該刪除與row_num = 5相關的行& retain row_num = 6。雖然它包含這個組合 它不完全匹配。

我在尋找如何制定一個查詢，可以刪除或至少返回row_num這種組合？

如果需要

Answer 1

我可以添加更多的信息，我相信這應該這樣做：

select distinct row_num 
from example_table t1 
where 
    not (
     exits (select 1 
       from example_table t2 
       where t2.row_num=t1.row_num and t2.eid='SM' and t2.row_value='E') 
     and 
     exits (select 1 
       from example_table t3 
       where t3.row_num=t1.row_num and t3.eid='PM' and t3.row_value='E') 
    ) 
    and 
    not (
     exits (select 1 
       from example_table t4 
       where t4.row_num=t1.row_num and t4.eid='SM' and t4.row_value='S') 
     and 
     exits (select 1 
       from example_table t5 
       where t5.row_num=t1.row_num and t5.eid='AM' and t5.row_value='E') 
     and 
     exits (select 1 
       from example_table t6 
       where t6.row_num=t1.row_num and t6.eid='PM' and t6.row_value='E') 
    );