Answer / krishna

This Query shall do the trick.

SQL> desc a;
Name Null? Type
------------------------------- -------- ----
A NUMBER(2)

SQL> select * from a;

A
---------
1
5
7

SQL> select x from (
2 select rownum x from all_tables ) a, (select max(a)
mx, min(a) mi from a) b

3 where a.x between b.mi and b.mx
4 and a.x not in (select * from a)
5 /

X
---------
2
3
4
6

SQL>

Answer / kavitha n

Create Table Missingsquence ( Num Number);

sql > select Num from Missingsquence ;

Missingsquence
--------------
1
5
7

SELECT LEVEL num
FROM DUAL
CONNECT BY LEVEL <= 7
MINUS
SELECT num
FROM missingsquence;

Answer / elumalai d

--QUESTION36:-What is different between union and minus?

UNOIN:- it returns all the records from both tables without duplicates.
Example:-
A={1,2,3,4}
B={2,3,4,5,6}
AUB={1,2,3,4,5,6}

CREATE TABLE question36 (empid NUMBER);
CREATE TABLE quest36 (empid NUMBER);

INSERT INTO question36 VALUES(1);
INSERT INTO question36 VALUES(2);
INSERT INTO question36 VALUES(3);
INSERT INTO question36 VALUES(4);

INSERT INTO quest36 VALUES(2);
INSERT INTO quest36 VALUES(3);
INSERT INTO quest36 VALUES(4);
INSERT INTO quest36 VALUES(5);
INSERT INTO quest36 VALUES(6);
COMMIT;

SELECT empid FROM question36
UNION
SELECT empid FROM quest36;

DELETE FROM question36;
DELETE FROM quest36;
COMMIT;

MINUS:- it returns table A values not available in table B.
Example:-
A={1,2,3,4}
B= {2,3,5}
A-B={1,4}

INSERT INTO question36 VALUES(1);
INSERT INTO question36 VALUES(2);
INSERT INTO question36 VALUES(3);
INSERT INTO question36 VALUES(4);

INSERT INTO quest36 VALUES(2);
INSERT INTO quest36 VALUES(3);
INSERT INTO quest36 VALUES(5);
COMMIT;

SELECT empid FROM question36
MINUS
SELECT empid FROM quest36;

DROP TABLE question36;
DROP TABLE quest36;

Answer / ajitnayak

select rownum
from dual
connect by level <= (select max(a) from mising_values)
minus
select * from mising_values;

Answer / ramya p

You could also use this query:

select * from <table_name>
where mod(column,2)=0;

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