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_56569 ( "County" text, "Year Founded" text, "County Seat" text, "2010 Census Population" real, "July 1, 2012 Population Estimate." real, "Area (Sq. Mi.)" real, "Land Area (Sq. Mi.)" real )

### Question ###
Which is the largest area in Greenville County, by square mile?

### Accurate SQL ###

SELECT MAX("Area (Sq. Mi.)") FROM table_56569 WHERE "County" = 'greenville county'