Oracle：子查询的替代方法

Question

Is there an alternative to re-write the below oracle query without using sub-queries

SELECT COL1,COL2 FROM TABLE WHERE COL2 IN (SELECT MAX(COL2) FROM TABLE)

Edit : There is only 1 table with COL1 and COL2 where the row with maximum value of COL2 is the expected output

Answer 1

SELECT COL1,COL2 
FROM TABLE
ORDER BY COL2 DESC
FETCH FIRST 1 ROW WITH TIES

Answer 2

This one should also work:

SELECT MAX(COL1) KEEP (DENSE_RANK LAST ORDER BY COL2) as COL1,
    MAX(COL2) as COL2 
FROM TABLE;

Answer 3

Use PARTITION key find out maximum col2 with col1 as per below:

select COL1, COL2 from (
select COL1, COL2, ROW_NUMBER() over(PARTITION BY COL1 ORDER BY COL2 desc) row_num  from TABLE 
 )  where row_num=1;

Answer 4

Assuming COL1 can be used as candidate key -

SELECT T1.COL1,
  T1.COL2
FROM TABLE1 T1
INNER JOIN TABLE1 T2
ON (T1.COL1  = T2.COL1
AND T1.COL2 >= T2.COL2)