Agnes,

	create cursor Schnaps ;
	(	c1	c(1), ;
		c2	c(1),; 
		c3	c(1) ;
	)
	
	insert into Schnaps values ('A', 'a', '1')
	insert into Schnaps values ('A', 'b', '2')
	insert into Schnaps values ('A', 'b', '3')
	insert into Schnaps values ('B', 'c', '4')
	insert into Schnaps values ('B', 'd', '4')
	insert into Schnaps values ('A', 'b', '3')

second question :
>c3
>4

	select c3 ;
		from Schnaps ;
		group by 1 ;
		having ( count( distinct c1 + c2 ) > 1) ;

First question :
>c1 c2 c3
>B c 4
>B d 4

	select S.* ;
		from Schnaps S, ;
			( ;
				select c3 ;
					from Schnaps ;
					group by  1 ;
					having ( count( distinct c1 + c2 ) > 1) ;
			) AA ;
			where	( S.c3 == AA.c3 )
		

>Hi All,
>
>I have a SQL problem I have no idea if I can solve it with one select (I can do with two, but this is not what i like to have)
>
>The problems comes from an import scenario.
>
>I have a table like
>

>c1   c2  c3 ...
>A    a    1
>A    b    2
>A    b    3
>B    c    4
>B    d    4
>A    b    3
>

>
>For a given c3 the combination of c1 and c2 should be the same. We can see that for c3=4 this is not true.
>
>How do I code a single SELECT SQL that returns just
>
>

>c1   c2  c3
>B    c    4
>B    d    4
>

>
>and
>
>

>c3
>4
>

>
>
>TIA
>
>Agnes