Re: Stuck on Foreign Keys

On 20/09/2007, Chester <chester(at)hica(dot)com(dot)au> wrote:
> Hi
>
> I have a question regarding foreign keys, I just cannot get it to create
> them for me....I must be doing something wrong but I have no idea what
> that might be :)
>
> I have a table "clients"
>
> clientID (primary)
> ticode
> Firstname
> SecondName
>
> I have a second table "titles"
>
> ticode (primary)
> Title
>
> I am trying to create a foreign key on TIcode "clients" table as in below,
>
> ALTER TABLE clients ADD CONSTRAINT the_title FOREIGN KEY (ticode)
> REFERENCES titles (ticode) ;
>
> I keep getting this error
>
> ERROR: insert or update on table "clients" violates foreign key
> constraint "the_title"
> DETAIL: Key (ticode)=( ) is not present in table "titles".
>
> Sorry, I have no idea where I am going wrong...Any help would be great

The ticode that you are trying to insert into clients -- does this
ticode exist in the table titles?