Table: lok_sabha_electorates_2
Columns: constituency_number
name
reserved_for_sc_st_none
district
number_of_electorates_2009

Question: What was the highest number of 2009 electorates for Raisen when the consituency number was 142?
SQL: SELECT MAX("number_of_electorates_2009") FROM lok_sabha_electorates_2 WHERE "district" = 'raisen' AND "constituency_number" = '142'