ORA-01748: only simple column names allowed here in Oracle

What I am trying to do ?

I am trying to create two tables and at the same time i am trying to link them together using foreign and primary keys. However I successfully create my parent table ( Student with primary key ) but failed to create child table ( Attendence with foreign key ).

What is the problem ?

I get the following error while creating Attendence table:

ERROR at line 5: ORA-01748: only simple column names allowed here

My code:

Student table:

create table Student (

            ST_ROLLNO  NUMBER(6) constraint s_pk primary key,
            ST_NAME    VARCHAR(30) not null,
            ST_ADDRESS  varchar(35) not null
);  

Attendence table:

create table Attendence (

            ST_ROLLNO  NUMBER(6),
            ST_DATE    VARCHAR(30) not null,
            ST_PRESENT_ABSENT  varchar(1) not null,
            constraint f_pk Attendence.ST_ROLLNO foreign key references Student(ST_ROLLNO)
);

Your foreign key constraint syntax is wrong; it should be:

constraint f_pk foreign key (ST_ROLLNO) references Student(ST_ROLLNO)

You are preceding the FK column name with the table name, which is wrong in itself, but also have it in the wrong place.

create table Student (

            ST_ROLLNO  NUMBER(6) constraint s_pk primary key,
            ST_NAME    VARCHAR(30) not null,
            ST_ADDRESS  varchar(35) not null
);  

Table STUDENT created.

create table Attendence (

            ST_ROLLNO  NUMBER(6),
            ST_DATE    VARCHAR(30) not null,
            ST_PRESENT_ABSENT  varchar(1) not null,
            constraint f_pk foreign key (ST_ROLLNO) references Student(ST_ROLLNO)
);

Table ATTENDENCE created.