On 07/07/11 10:40 AM, Rich Shepard wrote:
I'm having difficulty finding the correct syntax to modify an existing
table. The modification is to add two columns, each a foreign
reference to
the two key columns of another table.
The other table:
CREATE TABLE station_type (
sta_type VARCHAR(50),
secondary_type VARCHAR(50),
natural_indic BOOL,
PRIMARY KEY (sta_type, secondary_type)
);
When I try to alter the other table to add columns:
sta_type VARCHAR(50) REFERENCES station_type(sta_type) and
secondary_type VARCHAR(50) REFERENCES station_type(secondary_type)
I get syntax errors.
Since your PK of station_type is a composite, your foreign key must also
be composite.
CREATE TABLE stuffed (
id serial;
otherestuffs text;
sta varchar(50),
sec varchar(50),
FOREIGN KEY (sta, sec) REFERENCES station_type(sta_type,
secondary_type) ;
);
--
john r pierce N 37, W 122
santa cruz ca mid-left coast
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