Creating a new column and update values

Hello

I have a table (main_tbl) with 5 columns col1, col2, col3, col4, col5. the first 4 columns are already filled with values. col5, I include the rank. the following statement gives me the grade

(SELECT RANK() over (ORDER BY desc nulls last col4 col3 PARTITION) of main_tbl);

How can I build an update for this statement?

I used below the update statement and got "ORA-01427: einreihig subquery returns more rows" error.

Update main_tbl
Set current_date_rank = (SELECT RANK() over (ORDER BY desc nulls last col4 col3 PARTITION) main_tbl);

Thanks for your time and your help.

Tested and correct query

UPDATE main_tbl  t1
   SET col5 = ( SELECT rank1
                  FROM ( SELECT RANK() OVER ( PARTITION BY col3
                                                  ORDER BY col4 DESC nulls last
                                            )  rank1
                               ,ROWID
                           FROM main_tbl
                       )  t2
                 WHERE t1.ROWID  = t2.ROWID
              ) ;

Concerning
Arun

Tags: Database

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