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2 lines
459 B
SQL
2 lines
459 B
SQL
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CREATE TABLE device_relationships ( parent_device_id int(11) unsigned NOT NULL DEFAULT 0, child_device_id int(11) unsigned NOT NULL, PRIMARY KEY (parent_device_id, child_device_id), CONSTRAINT device_relationship_parent_device_id_fk FOREIGN KEY (parent_device_id) REFERENCES devices (device_id) ON DELETE CASCADE, CONSTRAINT device_relationship_child_device_id_fk FOREIGN KEY (child_device_id) REFERENCES devices (device_id) ON DELETE CASCADE )ENGINE=InnoDB;
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