Explain how to solve

Country

$\backslash$table$[[-$ ISOCode$2,$Name,Capital,Area,Population,PopDensity$],[$PK$,$Pakistan,Islamabad,$297600,212215030,713],[$BB$,$Barbados,Bridgetown,$200,286641,1726\mathrm{.}5],[$JP$,$Japan,Tokyo,$140800,126529100,898\mathrm{.}92]]$

Complete the query to order all rows by PopDensity in descending order. Write the most straightforward code

SELECT