CREATE TABLE prescribes (physician VARCHAR, dose VARCHAR)
CREATE TABLE physician (name VARCHAR, employeeid VARCHAR)

What are the names of the physician who prescribed the highest dose?
SELECT T1.name FROM physician AS T1 JOIN prescribes AS T2 ON T1.employeeid = T2.physician ORDER BY T2.dose DESC LIMIT 1
SELECT "T1"."name" FROM "physician" AS "T1" JOIN "prescribes" AS "T2" ON "T1"."employeeid" = "T2"."physician" ORDER BY "T2"."dose" DESC NULLS LAST LIMIT 1