Question: What is the lowest relative permeability with a skin depth larger than 0.112 inches?
SQL: SELECT MIN("Relative permeability") FROM "2-1255407-1" WHERE "Skin depth, inches" > 0.112;

Question: What is the average relative permeability with a resistivity smaller than 1.12 and a surface resistance relative to copper smaller than 1?
SQL: SELECT AVG("Relative permeability") FROM "2-1255407-1" WHERE "Resistivity (10 −6 ohm-inches)" < 1.12 AND "Surface resistance, Relative to copper" < 1.0;

Question: What is the sum of skin depth with a resistivity of 1.12 and a relative permeability larger than 1?
SQL: SELECT SUM("Skin depth, inches") FROM "2-1255407-1" WHERE "Resistivity (10 −6 ohm-inches)" = 1.12 AND "Relative permeability" > 1.0;