Retrieve a range of records from SQL query Oracle

Question

I want to retrieve range of rows in Oracle database. This is the table structure:
CREATE TABLE ACTIVESESSIONSLOG(
  ASESSIONID VARCHAR2(30 ) NOT NULL,
  USERID VARCHAR2(30 ),
  ACTIVITYSTART TIMESTAMP(6),
  ACTIVITYEND TIMESTAMP(6),
  ACTIVITY CLOB
/This is the SQL command that I use to get rows from the table:
SELECT * FROM ACTIVESESSIONSLOG WHERE ROWNUM >= 5 AND ROWNUM <= 10 ORDER BY USERID ASC;When I rum it no data is displayed. What is the proper way to get only 5 rows from the database?
Best wishes
Peter

Answer 1

Is this SQL query valid?I tend to say no: ORDER BY is applied last, so your rownum is not in correct anymore:
SQL> select rownum, ename, empno from emp order by empno
    ROWNUM ENAME           EMPNO
         3 SMITH            7369
         4 ALLEN            7499
         5 WARD             7521
         6 JONES            7566
         7 MARTIN           7654
         8 BLAKE            7698
         9 CLARK            7782
         2 SCOTT            7788
        10 KING             7839
        11 TURNER           7844
        12 ADAMS            7876
         1 JAMES            7900
        13 FORD             7902
        14 MILLER           7934
14 rows selected.You either use analytic ROW_NUMBER() as in my previous post - or you need to nest once again:
SQL> select rn, empno, ename
  from (select rownum rn, ename, empno
          from (  select ename, empno
                    from emp
                order by empno))
where rn between 4 and 5
        RN      EMPNO ENAME    
         4       7566 JONES    
         5       7654 MARTIN   
2 rows selected.