Syntax error with foreign key in add foreign key

Question

When I use alter and add statement I get an error

The SQL code is:

create table lecturer (

    lecturer_id int primary key,

    lecturer_name varchar(20)

    )
create table course_lecturer(

          date varchar(20)

      )
alter table course_lecturer

add foreign key(lecturer_id) references lecturer(lecturer_id)

The error boils down to:

Near "foreign key": syntax error

I want to link between lecturer table and course_lecturer

Answer 1

create table lecturer (
    lecturer_id int primary key,
    lecturer_name varchar(20)
    )

create table course_lecturer(
          //U need here a lecturer_id for bind the fk 
          date varchar(20)
      )
alter table course_lecturer

add foreign key(lecturer_id) references lecturer(lecturer_id)

Hope this help!