On 5/20/2013 7:59 AM, Paul Sanderson wrote:
I have a table of the form

create table tab (num int1 unique, num2, int)

for each row for num2 there is usually a matching num1. But not always.

I want to identify each row where num2 does not have a matching num1

select * from tab where num2 not in (select num1 from tab);

--
Igor Tandetnik

_______________________________________________
sqlite-users mailing list
sqlite-users@sqlite.org
http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users

Reply via email to