Question

I have never ‘hand-coded’ object creation code for SQL Server and foreign key decleration is seemingly different between SQL Server and Postgres. Here is my sql so far:

drop table exams; drop table question_bank; drop table anwser_bank;  create table exams (     exam_id uniqueidentifier primary key,     exam_name varchar(50), ); create table question_bank (     question_id uniqueidentifier primary key,     question_exam_id uniqueidentifier not null,     question_text varchar(1024) not null,     question_point_value decimal,     constraint question_exam_id foreign key references exams(exam_id) ); create table anwser_bank (     anwser_id           uniqueidentifier primary key,     anwser_question_id  uniqueidentifier,     anwser_text         varchar(1024),     anwser_is_correct   bit ); 

When I run the query I get this error:

Msg 8139, Level 16, State 0, Line 9 Number of referencing columns in foreign key differs from number of referenced columns, table ‘question_bank’.

Can you spot the error?

Answer 1

create table question_bank (     question_id uniqueidentifier primary key,     question_exam_id uniqueidentifier not null,     question_text varchar(1024) not null,     question_point_value decimal,     constraint fk_questionbank_exams foreign key (question_exam_id) references exams (exam_id) );