使用SQL比较DB2中两个表的字符串

Question

What I want to do is to compare the strings of two tables:

Imagine I have tables called students and professors. Both have an attribute called name. Now I want to get those Studentnames that contain the name of one of the professors. Of course I tried

select s.name
    from students s, professors p
    where s.name like p.pame

but it says:

SQL ERROR: An operand of LIKE is not a string, or the first operand is not a column.

Answer 1

select s.name
from students s
where s.name in ( select p.name from professors p);

Is this what you want? Other wise, maybe you need to write a cursor to fetch a profsseor.name one at a time, then find matched student in a loop.