At this stage, we can optionally establish a framework for referential integrity using a foreign key, as follows:
ALTER TABLE chp02.use_area_alt_relation ADD FOREIGN KEY (gid) REFERENCES chp02.use_area_alt_p (gid);
At this stage, we can optionally establish a framework for referential integrity using a foreign key, as follows:
ALTER TABLE chp02.use_area_alt_relation ADD FOREIGN KEY (gid) REFERENCES chp02.use_area_alt_p (gid);
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