Foreign keys are a data integrity feature of relational (and SQL) databases.
I have a model Coupon, and a model Photo with a ForeignKey to it: class Photo(models.Model): coupon = models.…
mysql django orm foreign-keysHow to enforce a constraint of foreign key on columns of same table in SQL while entering values in the …
sql oracle foreign-keys self-reference insert-intoIn this document (scroll down to the Unidirectional section): http://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/#…
hibernate one-to-many foreign-keys associationsI'm working on adding Django 2.0 support to the django-pagetree library. During automated testing, using an sqlite in-memory database, I'm getting …
python django sqlite foreign-keys django-2.0I am trying to create a table with a varchar column as foreign key but MySql gives me an error …
mysql database-design foreign-keys relational-databaseIn the databases course that I did during my education (approx. 4 years ago), I thought that it is recommended avoiding …
sql foreign-keys primary-key postgresql-9.1 sqldatatypesI want to implement one-to-many concept in my application. This is the scenario: I have two tables (i). Person(ID, …
database-design foreign-keys rdbmsIf a django model contains a foreign key field, and if that field is shown in list mode, then it …
django django-admin foreign-keyscreate table EMP(Eid int primary key) insert into EMP values(11e3) --self referencing alter table EMP add constraint fk_…
sql sql-server sql-server-2005 foreign-keys self-referenceHow can I alter the reference to a table in PostgreSQL when the table name has been changed? Say I …
postgresql foreign-keys ddl alter-table