Question

I’m currently having issues with an objective for an online class I am taking. The objective is below this, The code I’m using along with the error I’m receiving will be below that.

Use a variable to write a procedure called “AddNewAlbum.” This procedure takes at least two parameters – NameOfArtist and AlbumName. The procedure will:

1.Lookup ArtistID from the Artist table, where artist name is NameOfArtist

2.Insert a new row into Albums, using the ArtistID found in step #1 and the AlbumName parameter

For now it is safe to assume the artist exists before you run this procedure (meaning if you CALL AddNewAlbum (‘Bob Dylan’, ‘Street Legal’); then “Bob Dylan” already exists in the Artist table.

CREATE PROCEDURE AddNewAlbum (
NameOfArtist varcahr(50),
AlbumName varchar(50)
)
BEGIN
SELECT ArtistID, ArtistName FROM Artists
WHERE ArtistName = 'NameOfArtist';

INSERT INTO Albums (Title)
VALUES (AlbumName);
END;
//

CALL AddNewAlbum (
"Bob Dylan",
"Street Legal"
);
//

ERROR 1364 (HY000): Field ‘ArtistID’ doesn’t have a default value

^ Is the error I receive. Can anyone see what I am doing wrong? I tried taking the quotations around WHERE ArtistName = ‘NameOfArtist’;
but this did not work.

I’d like to add that it is pulling the Artists name and the ArtistID but is not adding the new row to Albums.

Answer 1

you can use INSERT INTO...SELECT statement on this,

DELIMITER $
CREATE PROCEDURE AddNewAlbum 
(
    @NameOfArtist varchar(50),
    @AlbumName varchar(50)
)
BEGIN
    INSERT INTO Albums (ID, Title)
    SELECT  ArtistID, @AlbumName AS Title
    FROM    Artists
    WHERE   ArtistName = @NameOfArtist;
END $
DELIMITER ;