Database schema:
CREATE TABLE Students (
  student_id NUMBER PRIMARY KEY,
  bio_data TEXT,
  student_details TEXT
);
CREATE TABLE Transcripts (
  transcript_id NUMBER PRIMARY KEY,
  student_id NUMBER,
  date_of_transcript TIME,
  transcript_details TEXT,
  FOREIGN KEY (student_id) REFERENCES Students(student_id)
);
CREATE TABLE Behaviour_Monitoring (
  behaviour_monitoring_id NUMBER PRIMARY KEY,
  student_id NUMBER,
  behaviour_monitoring_details TEXT,
  FOREIGN KEY (student_id) REFERENCES Students(student_id)
);
CREATE TABLE Addresses (
  address_id NUMBER PRIMARY KEY,
  address_details TEXT
);
CREATE TABLE Ref_Event_Types (
  event_type_code TEXT PRIMARY KEY,
  event_type_description TEXT
);
CREATE TABLE Ref_Achievement_Type (
  achievement_type_code TEXT PRIMARY KEY,
  achievement_type_description TEXT
);
CREATE TABLE Ref_Address_Types (
  address_type_code TEXT PRIMARY KEY,
  address_type_description TEXT
);
CREATE TABLE Ref_Detention_Type (
  detention_type_code TEXT PRIMARY KEY,
  detention_type_description TEXT
);
CREATE TABLE Student_Events (
  event_id NUMBER PRIMARY KEY,
  event_type_code TEXT,
  student_id NUMBER,
  event_date TIME,
  other_details TEXT,
  FOREIGN KEY (event_type_code) REFERENCES Ref_Event_Types(event_type_code),
  FOREIGN KEY (student_id) REFERENCES Students(student_id)
);
CREATE TABLE Teachers (
  teacher_id NUMBER PRIMARY KEY,
  teacher_details TEXT
);
CREATE TABLE Student_Loans (
  student_loan_id NUMBER PRIMARY KEY,
  student_id NUMBER,
  date_of_loan TIME,
  amount_of_loan NUMBER,
  other_details TEXT,
  FOREIGN KEY (student_id) REFERENCES Students(student_id)
);
CREATE TABLE Classes (
  class_id NUMBER PRIMARY KEY,
  student_id NUMBER,
  teacher_id NUMBER,
  class_details TEXT,
  FOREIGN KEY (teacher_id) REFERENCES Teachers(teacher_id),
  FOREIGN KEY (student_id) REFERENCES Students(student_id)
);
CREATE TABLE Students_Addresses (
  student_address_id NUMBER PRIMARY KEY,
  address_id NUMBER,
  address_type_code TEXT,
  student_id NUMBER,
  date_from TIME,
  date_to TIME,
  FOREIGN KEY (address_type_code) REFERENCES Ref_Address_Types(address_type_code),
  FOREIGN KEY (address_id) REFERENCES Addresses(address_id),
  FOREIGN KEY (student_id) REFERENCES Students(student_id)
);
CREATE TABLE Detention (
  detention_id NUMBER PRIMARY KEY,
  detention_type_code TEXT,
  student_id NUMBER,
  datetime_detention_start TIME,
  datetime_detention_end TIME,
  detention_summary TEXT,
  other_details TEXT,
  FOREIGN KEY (detention_type_code) REFERENCES Ref_Detention_Type(detention_type_code),
  FOREIGN KEY (student_id) REFERENCES Students(student_id)
);
CREATE TABLE Achievements (
  achievement_id NUMBER PRIMARY KEY,
  achievement_type_code TEXT,
  student_id NUMBER,
  date_achievement TIME,
  achievement_details TEXT,
  other_details TEXT,
  FOREIGN KEY (achievement_type_code) REFERENCES Ref_Achievement_Type(achievement_type_code),
  FOREIGN KEY (student_id) REFERENCES Students(student_id)
);

Question: Which students have a student loan more than the average amount? List the students' biographical data and the details.
SQL: SELECT T1.bio_data ,  T1.student_details FROM Students AS T1 JOIN Student_Loans AS T2 ON T1.student_id  =  T2.student_id WHERE T2.amount_of_loan  >  ( SELECT avg(amount_of_loan) FROM Student_Loans )

Question: When was the earliest date of loan?
SQL: SELECT date_of_loan FROM Student_Loans ORDER BY date_of_loan ASC LIMIT 1

Question: List the details for all the pairs of teachers and students who are in the same class.
SQL: SELECT T1.teacher_details ,  T3.student_details FROM Teachers AS T1 JOIN Classes AS T2 ON T1.teacher_id  =  T2.teacher_id JOIN Students AS T3 ON T2.student_id  =  T3.student_id

Question: How many teachers have taught a student who has not won any achievements?
SQL: SELECT count(DISTINCT T1.teacher_id) FROM Teachers AS T1 JOIN Classes AS T2 ON T1.teacher_id  =  T2.teacher_id WHERE T2.student_id NOT IN ( SELECT student_id FROM Achievements )

Question: What are the date and detail of each transcript?
SQL: SELECT date_of_transcript ,  transcript_details FROM Transcripts

Question: How are all the achievements described? List the achievement detail and the type description.
SQL: SELECT T1.achievement_details ,  T2.achievement_type_description FROM Achievements AS T1 JOIN Ref_Achievement_Type AS T2 ON T1.achievement_type_code  =  T2.achievement_type_code

Question: Which teachers have taught the student with the earliest transcript issuance? List the teacher details.
SQL: SELECT T1.teacher_details FROM Teachers AS T1 JOIN Classes AS T2 ON T1.teacher_id  =  T2.teacher_id JOIN Transcripts AS T3 ON T2.student_id  =  T3.student_id ORDER BY T3.date_of_transcript ASC LIMIT 1

Question: List the details of the teachers who teach some class whose detail has the substring 'data' but do not teach a class whose detail contains the prefix 'net'
SQL: SELECT T1.teacher_details FROM Teachers AS T1 JOIN Classes AS T2 ON T1.teacher_id  =  T2.teacher_id WHERE T2.class_details LIKE '%data%' EXCEPT SELECT T1.teacher_details FROM Teachers AS T1 JOIN Classes AS T2 ON T1.teacher_id  =  T2.teacher_id WHERE T2.class_details LIKE 'net%'

Question: What is the transcript issuance date for the student with the largest amount of loan?
SQL: SELECT T1.date_of_transcript FROM Transcripts AS T1 JOIN Student_Loans AS T2 ON T1.student_id  =  T2.student_id ORDER BY T2.amount_of_loan DESC LIMIT 1

Question: How much total loan does each student have ? List the student ids and the amounts .
SQL: select student_id ,  sum(amount_of_loan) from student_loans group by student_id

Question: Find the biographical data and details of students who got not only the most common result but also a result that is obtained by 3 students in behaviour monitoring.
SQL: SELECT T1.bio_data ,  T1.student_details FROM Students AS T1 JOIN Behaviour_Monitoring AS T2 ON T1.student_id  =  T2.student_id WHERE T2.behaviour_monitoring_details IN ( SELECT behaviour_monitoring_details FROM Behaviour_Monitoring GROUP BY behaviour_monitoring_details ORDER BY count(*) DESC LIMIT 1 ) INTERSECT SELECT T1.bio_data ,  T1.student_details FROM Students AS T1 JOIN Behaviour_Monitoring AS T2 ON T1.student_id  =  T2.student_id WHERE T2.behaviour_monitoring_details IN ( SELECT behaviour_monitoring_details FROM Behaviour_Monitoring GROUP BY behaviour_monitoring_details HAVING count(*)  =  3 )

Question: List the the address details and the biographical information of the students.
SQL: SELECT T1.address_details ,  T3.bio_data FROM Addresses AS T1 JOIN Students_Addresses AS T2 ON T1.address_id  =  T2.address_id JOIN Students AS T3 ON T2.student_id  =  T3.student_id

Question: Return the distinct descriptions of all the detentions that have happened.
SQL: SELECT distinct(T1.detention_type_description) FROM Ref_Detention_Type AS T1 JOIN Detention AS T2 ON T1.detention_type_code  =  T2.detention_type_code

Question: List the biographical data and the date of the transcript of all the students.
SQL: SELECT T1.bio_data ,  T2.date_of_transcript FROM Students AS T1 JOIN Transcripts AS T2 ON T1.student_id  =  T2.student_id

Question: What are the address details and biographical information of each student?
SQL: SELECT T1.address_details ,  T3.bio_data FROM Addresses AS T1 JOIN Students_Addresses AS T2 ON T1.address_id  =  T2.address_id JOIN Students AS T3 ON T2.student_id  =  T3.student_id

Question: Find the most common result in the behavioral monitoring details. What are the count and the details of this result?
SQL: SELECT count(DISTINCT student_id) ,  behaviour_monitoring_details FROM Behaviour_Monitoring GROUP BY behaviour_monitoring_details ORDER BY count(*) DESC LIMIT 1