CREATE TABLE table_name_19 (district VARCHAR, reserved_for___sc___st__none_ VARCHAR, constituency_number VARCHAR)

Name the District that has a Reserved for ( SC / ST /None) of none and a Constituency number of 242?
SELECT district FROM table_name_19 WHERE reserved_for___sc___st__none_ = "none" AND constituency_number = "242"
SELECT "district" FROM "table_name_19" WHERE "242" = "constituency_number" AND "none" = "reserved_for___sc___st__none_"