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Databases Creating and Modifying Database Tables Creating and Modifying Database Tables Making Changes to a Database

Otec Perez Glass
Otec Perez Glass
7,678 Points
Posted by Otec Perez Glass
Otec Perez Glass
7,678 Points

Is not Working!

The requirement is

Now recreate the MEMBERS table with the new FAVORITE_ROCK_ID column, and make sure it has a foreign key constraint to the ID column of the ROCKS table. The columns should now be: ID, FIRST_NAME, LAST_NAME, and FAVORITE_ROCK_ID.

My Solution was

CREATE TABLE MEMBERS ( 
 ID PRIMARY KEY,
 FIST_NAME,
 LAST_NAME,
 FAVORITE_ROCK_ID REFERENCES ROCKS(ID) );

Also tried different ways like

CREATE TABLE MEMBERS(
 ID INTEGER PRIMARY KEY,
 FIST_NAME VARCHAR(255),
 LAST_NAME VARCHAR(255), 
FAVORITE_ROCK_ID REFERENCES ROCKS(ID) );

The Error message is

Make sure you're creating all 4 columns: id, first_name, last_name, and favorite_rock_id. But I already have them

3 Answers

ivana kantnerova
ivana kantnerova
15,932 Points
ivana kantnerova
ivana kantnerova
15,932 Points

maybe ... FIST_NAME vs. first_name and data type "int" should be in FAVORITE_ROCK_ID REFERENCES ROCKS(ID) );

like MySQL:

CREATE TABLE Orders ( OrderID int NOT NULL, OrderNumber int NOT NULL, PersonID int, PRIMARY KEY (OrderID), FOREIGN KEY (PersonID) REFERENCES Persons(PersonID) );

or SQL Server / Oracle / MS Access:

CREATE TABLE Orders ( OrderID int NOT NULL PRIMARY KEY, OrderNumber int NOT NULL, PersonID int FOREIGN KEY REFERENCES Persons(PersonID) ); from https://www.w3schools.com/sql/sql_foreignkey.asp

Otec Perez Glass
Otec Perez Glass
7,678 Points
Otec Perez Glass
Otec Perez Glass
7,678 Points

Thanks for the information hope your are doing well ivana kantnerova 

CREATE TABLE MEMBERS(
id int NOT NULL PRIMARY KEY,
first_name varchar NOT NULL,
last Name varchar NOT NULL,
FAVORITE_ROCK_ID REFERENCES ROCKS(ID)
);

CREATE TABLE MEMBERS(
 id int NOT NULL PRIMARY KEY,
 first_name varchar NOT NULL,
 last Name varchar NOT NULL,
 FAVORITE_ROCK_ID int foreign key REFERENCES ROCKS(ID) );

 CREATE TABLE MEMBERS( id int NOT NULL PRIMARY KEY,
 first_name varchar NOT NULL,
 last Name varchar NOT NULL,
 FAVORITE_ROCK_ID int,
 foreign key(FAVORITE_ROCK_ID) REFERENCES ROCKS(ID) );
ivana kantnerova
ivana kantnerova
15,932 Points
ivana kantnerova
ivana kantnerova
15,932 Points

you forgot keyword "foreign key", and date type.. try this CREATE TABLE MEMBERS( id int NOT NULL PRIMARY KEY, first_name varchar NOT NULL, last Name varchar NOT NULL, FAVORITE_ROCK_ID int foreign key REFERENCES ROCKS(ID) ); or this CREATE TABLE MEMBERS( id int NOT NULL PRIMARY KEY, first_name varchar NOT NULL, last Name varchar NOT NULL, FAVORITE_ROCK_ID int, foreign key(FAVORITE_ROCK_ID) REFERENCES ROCKS(ID) );

Roxanne Reyes
Roxanne Reyes
9,006 Points

I tried your code, but it still doesn't work.