Select Query--General Question

Question

Hello All,
With out using WHERE CLAUSE Can we select first 10 rows from a table in Oracle..??
This is an interview question I faced recently!!
Thank you
Kiran

Answer 1

How about this...
SQL> create table xtmp (n number);
Table created.
SQL> insert into xtmp select rownum from all_objects where rownum < 11;
10 rows created.
SQL> select b.* from xtmp a left join (select rownum rn, c.* from emp c) b on a.n=b.rn;
        RN      EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
         1       7369 SMITH      CLERK           7902 17-DEC-80        800                    20
         2       7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
         3       7521 WARD       SALESMAN        7698 22-FEB-81       1250        500         30
         4       7566 JONES      MANAGER         7839 02-APR-81       2975                    20
         5       7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400         30
         6       7698 BLAKE      MANAGER         7839 01-MAY-81       2850                    30
         7       7782 CLARK      MANAGER         7839 09-JUN-81       2450                    10
         8       7788 SCOTT      ANALYST         7566 19-APR-87       3000                    20
         9       7839 KING       PRESIDENT            17-NOV-81       5000                    10
        10       7844 TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
10 rows selected.you can use pl/sql table instead of above temp table.
Thanks..