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Dharmesh Nayee
1,090 PointsWhy does my foreign key constrant not work?
I am getting an error message to add a foreign key constraint.
My Code:
CREATE TABLE MEMBERS (ID PRIMARY KEY, FIRST_NAME, LAST_NAME, FAVORITE_ROCK_ID PRIMARY KEY REFERENCES ROCKS(ID));
3 Answers
KRIS NIKOLAISEN
54,971 PointsYou are attempting to create two primary keys in the same table. Eliminate PRIMARY KEY from your FAVORITE_ROCK_ID column so you just have:
CREATE TABLE MEMBERS(ID PRIMARY KEY, FIRST_NAME, LAST_NAME, FAVORITE_ROCK_ID REFERENCES ROCKS(ID));
Dharmesh Nayee
1,090 PointsIgnore.... i see my mistake.
it is suppose to be CREATE TABLE MEMBERS .......NOT ROCKS.
KRIS NIKOLAISEN
54,971 PointsYour statement would create a table named ROCKS. It needs to create a table named MEMBERS.
Dharmesh Nayee
1,090 PointsDharmesh Nayee
1,090 PointsThank you Kris.
However i am still getting an error. It is saying i need to create 4 columns. which i have?
CREATE TABLE ROCKS (ID PRIMARY KEY, FIRST_NAME, LAST_NAME, FAVORITE_ROCK_ID REFERENCES ROCKS(ID));