Re: multiple primary keys and reference

CREATE TABLE Parts(
PartNo varchar(20) NOT NULL,
machtypesid int4 NOT NULL,
BestPrice decimal(100,2),
Comment text,
PRIMARY KEY (PartNo,machtypesid));

CREATE TABLE MachDefs(
defid serial NOT NULL UNIQUE PRIMARY KEY,
Description text,
PartNo varchar(20),
MachTypeID int4 NOT NULL,
FOREIGN KEY (PartNo,MachTypeID) REFERENCES Parts (PartNo,machtypesid));

-- 
Achilleus Mantzios
S/W Engineer
IT dept
Dynacom Tankers Mngmt
tel:    +30-10-8981112
fax:    +30-10-8981877
email:  achill@matrix.gatewaynet.com       mantzios@softlab.ece.ntua.gr