Insert values in inheritance tables - sql

Question

CREATE TABLE projeto.Person (
Person_Code INT IDENTITY(1,1) NOT NULL,
birthDate DATE NOT NULL,
Name VARCHAR(50) NOT NULL,
PRIMARY KEY (Person_Code)
)
CREATE TABLE projeto.Student (
Student_Code INT REFERENCES projeto.Person (Person_Code),
payment INT NOT NULL,
PRIMARY KEY (Student_Code),
)
CREATE TABLE projeto.teacher (
payment INT NOT NULL,
teacher_Code INT,
PRIMARY KEY (teacher_Code),
CHECK (payment > 350)
)
How do I insert values ​​in student, paying attention that a student has all person attributes? e.g. student has name, birth_date etc.
I tried this:
INSERT INTO projeto.Person VALUES
('1961-03-26', John Adam')
but this only adds in a person, and I can't tell if its a student or not.

Answer 1

I guess its how to get the recently inserted Person_Code that you are asking? In which case use scope_identity().
declare #BirthDate date, #Name varchar(50), #Payment int, #IsStudent bit, #IsTeacher bit, #NewPersonCode int;
-- SET THE RELEVANT VARIABLE VALUES
-- Insert person
insert into projeto.Person (BirthDate, [Name])
select #BirthDate, #Name;
-- Get the Person_Code of the new person record
set #NewPersonCode = scope_identity();
-- Insert Student record if a student
insert into projeto.Student (Student_Code, Payment)
select #NewPersonCode, #Payment
where #IsStudent = 1;
-- Insert Teacher record if a teacher
insert into projeto.Teacher (Teacher_Code, Payment)
select #NewPersonCode, #Payment
where #IsTeacher = 1;