Answer / tanoy guhasarkar

the DBMS_RANDOM package provides a built-in random number
generator utility.

Using In Side A Block:--
DECLARE
my_random BINARY_INTEGER;
BEGIN
my_random := DBMS_RANDOM.RANDOM;

dbms_output.put_line(my_random);

end ;


Executing This Code, We Will Get A Random Number Every Time...

In Side A Select Statement :--

select DBMS_RANDOM.RANDOM from dual;

Note:--

This DBMS_RANDOM package included in oracle after oracle 8.

Answer / nusrath sultana

We can make use of sequence to generate random numbers.
example:
SQL> create sequence seq1 start with 1 increment by 1
maxvalue 100;
SQL>Sequence created.

SQL> create table dup(rollno number(10) primary key,name
varchar2(20) not null);

Table created.

SQL> insert into dup values(seq1.nextval,'&name');
Enter value for name: SAM
old 1: insert into dup values(seq1.nextval,'&name'
new 1: insert into dup values(seq1.nextval,'SAM')

1 row created.

SQL> /

Enter value for name: RAM
old 1: insert into dup values(seq1.nextval,'&name'
new 1: insert into dup values(seq1.nextval,'RAM')

1 row created.

SQL> /
Enter value for name: REENA
old 1: insert into dup values(seq1.nextval,'&name'
new 1: insert into dup values(seq1.nextval,'REENA'

1 row created.

SQL> /
Enter value for name: TINA
old 1: insert into dup values(seq1.nextval,'&name'
new 1: insert into dup values(seq1.nextval,'TINA')

1 row created.

SQL> /
Enter value for name: MONA
old 1: insert into dup values(seq1.nextval,'&name'
new 1: insert into dup values(seq1.nextval,'MONA')

1 row created.

SQL> SELECT * FROM DUP;

ROLLNO NAME
---------- --------------------
1 SAM
2 RAM
3 REENA
4 TINA
5 MONA

Answer / swamireddy

first take table. the table contain a more than one row.
write query display the row randomly.
SELECT column FROM table
ORDER BY RANDOM()
LIMIT 1

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