CREATE TABLE table_63719 ("Constituency number" TEXT, "Name" TEXT, "Reserved for  (  SC / ST /None ) " TEXT, "District" TEXT, "Number of electorates  ( 2009 ) " FLOAT)

What is district has a name of Rajnagar?
SELECT "District" FROM table_63719 WHERE "Name" = 'rajnagar'
SELECT "District" FROM "table_63719" WHERE "Name" = 'rajnagar'