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Select t_office.full_name, AVG(double(t_cenz.cenz))



From t_office

Inner Join t_lector On t_lector.id_office=t_office.id_office

Inner Join t_lesson On t_lector.id_lector=t_lesson.id_lector and

t_lesson.begin_lesson >= '2008-10-01 10:00:00.0' and t_lesson.end_lesson <= '2008-12-01 12:00:00.0'

Inner Join t_exercise On t_exercise.id_lesson=t_lesson.id_lesson

Inner join wasteland.t_typeexercise t_typeexercise on t_typeexercise.id_typeexercise = t_exercise.id_typeexercise

Inner Join t_cenz On t_cenz.id_exercise=t_exercise.id_exercise



group by t_office.full_name



Период с 2008-10-01 10:00:00 по 2008-12-01 12:00:00