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_name_86 ( number_of_electorates__2009_ INTEGER, district VARCHAR, constituency_number VARCHAR )

### Question ###
What was the highest number of 2009 electorates for Raisen when the consituency number was 142?

### Accurate SQL ###

SELECT MAX(number_of_electorates__2009_) FROM table_name_86 WHERE district = "raisen" AND constituency_number = "142"