1.
To
fetch ALTERNATE records from a table. (EVEN NUMBERED)
select * from emp
where rowid in (select decode(mod(rownum,2),0,rowid, null) from emp);
2.
To
select ALTERNATE records from a table. (ODD NUMBERED)
select * from emp
where rowid in (select decode(mod(rownum,2),0,null ,rowid) from emp);
3.
Find
the 3rd MAX salary in the emp table.
select distinct sal
from emp e1 where 3 = (select count(distinct sal) from emp e2 where e1.sal
<= e2.sal);
4.
Find
the 3rd MIN salary in the emp table.
select distinct sal
from emp e1 where 3 = (select count(distinct sal) from emp e2where e1.sal >=
e2.sal);
5.
Select
FIRST n records from a table.
select * from emp
where rownum<= &n;
