veritas_86 (5/26/2009)

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so I am creating a database where I have a parent table with multiple columns that I would like to have reference a single column in a child table. I would like to create relationships between the columns in the parent table and the column in the child table. For an example, I'm passing this to SQL

parent table:

CREATE TABLE Parent(val1 int NOT NULL, val2 int NOT NULL, val3 int NOT NULL, val4 int NOT NULL, PRIMARY KEY (val1), UNIQUE (val2), UNIQUE(val3), UNIQUE(val4))

child table:

CREATE TABLE Child(val1 int NOT NULL, val2 int, val3 int, val4 int, PRIMARY KEY(val1))

relationships

ALTER TABLE Child ADD FOREIGN KEY (val1) REFERENCES Parent(val2)

ALTER TABLE Child ADD FOREIGN KEY (val1) REFERENCES Parent(val3)

ALTER TABLE Child ADD FOREIGN KEY (val1) REFERENCES Parent(val4)

These relationships are added fine, but when I try to update data to the child table, I get an error because columns 'val1' will contain data from many columns in the parent table, but each relationship requires that each value only appear in the referenced column in the Parent table. So my understanding is that this format will not work. However, I want the values in the Child table to column to be referencing the values in all the Parent table columns. Is there a way to get this to work? Thanks for your help!