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Composite Primary Key

Posted on 2003-11-10
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Last Modified: 2008-03-03
How can i implement :
Foreign key of one table referencing composite primary key of other table?
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Question by:ewhopcis
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3 Comments
 
LVL 15

Expert Comment

by:namasi_navaretnam
ID: 9717568
Try this

Alter table table2
add CONSTRAINT fkey FOREIGN KEY (id1, id2 ) REFERENCES dbo.table1


id1, id2 columns exists in both Table1, Table2
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Author Comment

by:ewhopcis
ID: 9732319
can i define the composite foreign key while creating the table?
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LVL 15

Accepted Solution

by:
namasi_navaretnam earned 120 total points
ID: 9732433
Yes.

drop table a1
go
create table a1
(
col1 int,
col2 int,
PRIMARY KEY (Col1, Col2)
)

go

create table a2
(
 myid int not null,
 col1 int not null,
 col2 int not null,
 FOREIGN KEY (col1, col2) REFERENCES a1 (col1, col2)

)

go
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