Question: How many full professors work under hartmut kliemt with more than 0 lecturers?
SQL: SELECT COUNT("Full professors") FROM "2-12591022-3" WHERE "Head" = 'hartmut kliemt' AND "Lecturers" > 0.0;

Question: What is the least amount of lecturers in the accounting department with less than 5 full professors?
SQL: SELECT MIN("Lecturers") FROM "2-12591022-3" WHERE "Department" = 'accounting' AND "Full professors" < 5.0;

Question: What is the average number of honorary professors in the Economics department with 1 lecturer?
SQL: SELECT AVG("Honorary professors") FROM "2-12591022-3" WHERE "Lecturers" = 1.0 AND "Department" = 'Economics';