CREATE TABLE "subnet_and_host_counts" (
  "prefix_size" text,
  "network_mask" text,
  "available_subnets" real,
  "usable_hosts_per_subnet" real,
  "total_usable_hosts" real
);

Question: When the network mask is 255.255.255.252 what is the prefix size?
SQL: SELECT "prefix_size" FROM "subnet_and_host_counts" WHERE "network_mask"='255.255.255.252';

Question: available subnets leading total is?
SQL: SELECT MAX("available_subnets") FROM "subnet_and_host_counts";

Question: When the network mask is  255.255.255.128 what is the lowest available subnet?
SQL: SELECT MIN("available_subnets") FROM "subnet_and_host_counts" WHERE "network_mask"='255.255.255.128';

Question: When the network mask is 255.255.255.224 what is the highest  total usable host?
SQL: SELECT MAX("total_usable_hosts") FROM "subnet_and_host_counts" WHERE "network_mask"='255.255.255.224';