By: newkid

newkid — Thu, 01 Jul 2010 21:11:52 +0000

SELECT date_time, validity, DENSE_RANK() OVER(ORDER BY elements) AS id
  FROM (SELECT date_time, validity, MAX(path) OVER(PARTITION BY date_time) elements
          FROM (SELECT t.*,SYS_CONNECT_BY_PATH(validity,'/') path
                  FROM (SELECT test.*,ROW_NUMBER() OVER(PARTITION BY date_time ORDER BY validity) rn
                          FROM test
                          ) t
                START WITH rn=1 CONNECT BY date_time = PRIOR date_time AND rn = PRIOR rn+1
                )
)

11GR2:
SELECT date_time, validity, DENSE_RANK() OVER(ORDER BY elements) AS id
  FROM (SELECT test.*,LISTAGG(validity,',') WITHIN GROUP (ORDER BY validity) OVER(PARTITION BY date_time) elements
          FROM test
        );

Comments on: How to assign the same number identifier to different groups that contain the identical set of data in a SQL statement

By: newkid