Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE tryout (cName VARCHAR, pPos VARCHAR)

### Question ###
Find the names of schools that have some players in the mid position but not in the goalie position.

### Accurate SQL ###

SELECT cName FROM tryout WHERE pPos = 'mid' EXCEPT SELECT cName FROM tryout WHERE pPos = 'goalie'