Oracle create table with foreign key error - Invalid Identifier

Question

I'm getting an error saying invalid identifier when I try to add this table. Its been bugging me for too long now so I thought I'd ask.

CREATE TABLE HORSE 
(  
horse_id numeric PRIMARY KEY,
horse_name character(30) not null,
horse_gender character(1) not null,
horse_height decimal not null,
horse_image character(40), 
CONSTRAINT horse_breed FOREIGN KEY (breed_id) REFERENCES breed(breed_id) 
);

The error message is;

Error at Command Line:34 Column:37
Error report:
SQL Error: ORA-00904: "BREED_ID": invalid identifier
00904. 00000 -  "%s: invalid identifier"
*Cause:    
*Action:

Thanks and sorry for asking what is probably a really dumb question.

Answer 1

You need breed_id in HORSE table

CREATE TABLE HORSE 
(  
horse_id numeric PRIMARY KEY,
horse_name character(30) not null,
horse_gender character(1) not null,
horse_height decimal not null,
horse_image character(40), 
breed_id numeric null
CONSTRAINT horse_breed FOREIGN KEY (breed_id) REFERENCES breed(breed_id) 
);