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 table_19155 ( "High School" text, "Type" text, "Established" real, "Enrollment" real, "Mascot" text, "WIAA Classification" text, "Notes" text )

### Question ###
What is the WIAA classification of Oakland Alternative High School?

### Accurate SQL ###

SELECT "WIAA Classification" FROM table_19155 WHERE "High School" = 'Oakland Alternative'