FOREIGN KEY after CREATE TABLE?
How can i add foreign keys after the CREATE TABLE? Is there some
combination of other SQL commands that will do the trick?
My problem is;
a. that I have a circular reference between 3 tables
b. that I must be able to reverse engineer the resulting references in
the shema by querying for foreign keys
Right now I am calculating a dependency hierarchy and generating tables
in the resulting order but this does not work for a circular ref.
Aside from the circular ref issues... i think it would be easier and
safer to be able to generate all of the tables in one pass (with primary
key defs) and then add the foreign keys in a second pass.
Any help appreciated.
Peter
On Sunday, 26. August 2001 00:37, Peter Harvey wrote:
How can i add foreign keys after the CREATE TABLE? Is there some
combination of other SQL commands that will do the trick?
Peter,
try ALTER TABLE a_table ADD CONSTRAINT ... FOREIGN KEY ...
Regards,
--
Christof Glaser
How can i add foreign keys after the CREATE TABLE? Is there some
combination of other SQL commands that will do the trick?Peter,
try ALTER TABLE a_table ADD CONSTRAINT ... FOREIGN KEY ...
<Grr> I hate asking stupid questions. I scanned the ALTER TABLE syntax
and somehow overlooked it.
Thanks!
Peter