The table specs you show don't have primary keys, so they're not really tables at all.
And, it's not clear why you need something called `isinsfdc`.
To find a value in table a based on a value in table b, there needs to be a column in b such that every value of that column in b points at exactly one value of the matching key in a. Such a key column in b is called a foreign key.
So given tables ...
a(aid int, info int)
b(bid int, aid int, foreign key(aid) references a(aid), moreinfo int)
... then if b has the row (1, 1, 65432), a relational database like MySQL guarantees that table a has a row where aid=1, so you could find all its values with
select a.info
from b
join a using(aid)
where b.aid=1;
You'll need to study relational database design.
http://www.artfulsoftware.com/dbresources.html has some links to useful intro articles on the subject.