Restore mysql database with some columns content enclosed by " and another not
LOAD DATA INFILE 'x:/folder/filename.csv'
INTO TABLE tablename ( field1,    -- load value into the field directly
                       field2,    -- when it is enclosed, d-quotes are saved
                       ... , 
                       @dummyN,   -- load value with wrapping into UDV
                       ...)
SET fieldN = TRIM(BOTH '"' FROM @dummyN) -- extract value from UDV and store into the field


This allows to remove d-quote chars when they are wrappers and store when they're a part of value, if this occures at the same time (for different fields).