Tag foreign-key - This is page 9 - GeneraCodice

mysql - How to remove duplicate rows in parent table and leave one row with the lowest ID, and replace foreign key in child's table with this ID?

https://www.generacodice.com/en/articolo/3141409/mysql-how-to-remove-duplicate-rows-in-parent-table-and-leave-one-row-with-the-lowest-id-and-replace-foreign-key-in-child-s-table-with-this-id
  mysql  -  PHP  -  replace  -  duplication  -  foreign-key
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Introducing FOREIGN KEY constraint 'FK_X_Y' on table 'X' may cause cycles or multiple cascade paths

https://www.generacodice.com/en/articolo/3139832/introducing-foreign-key-constraint-fk-x-y-on-table-x-may-cause-cycles-or-multiple-cascade-paths
  sql-server  -  cascade  -  foreign-key
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Foreign key reference to column that is no primary key

https://www.generacodice.com/en/articolo/3139504/foreign-key-reference-to-column-that-is-no-primary-key
  postgresql  -  database-design  -  hierarchy  -  check-constraints  -  foreign-key
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Foreign key references on column definitions are ignored. Feature, not a bug — why? [closed]

https://www.generacodice.com/en/articolo/3135551/foreign-key-references-on-column-definitions-are-ignored-feature-not-a-bug-why-closed
  mysql  -  mariadb  -  foreign-key
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Is it possible to enforce corresponding hierarchies?

https://www.generacodice.com/en/articolo/3130661/is-it-possible-to-enforce-corresponding-hierarchies
  database-design  -  relational-theory  -  foreign-key  -  constraint
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Alternatives to storing a record with exactly n multiple foreign keys from the same foreign table, where the relationships can't be repeated

https://www.generacodice.com/en/articolo/3127957/alternatives-to-storing-a-record-with-exactly-n-multiple-foreign-keys-from-the-same-foreign-table-where-the-relationships-can-t-be-repeated
  normalization  -  database-theory  -  foreign-key
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Foreign key twice in same table for different columns?

https://www.generacodice.com/en/articolo/3124147/foreign-key-twice-in-same-table-for-different-columns
  mysql  -  referential-integrity  -  foreign-key  -  constraint
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Why does querying for records that violate a foreign key return incorrect results?

https://www.generacodice.com/en/articolo/3120788/why-does-querying-for-records-that-violate-a-foreign-key-return-incorrect-results
  stored-procedures  -  uniqueidentifier  -  sql-server-2012  -  foreign-key
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Is there a usecase to create separate indices on the foreign keys of junction/associative table?

https://www.generacodice.com/en/articolo/3113493/is-there-a-usecase-to-create-separate-indices-on-the-foreign-keys-of-junction-associative-table
  postgresql  -  primary-key  -  index  -  index-tuning  -  foreign-key
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Is there a difference between making a composite foreign key for all columns or a foreign key for each column?

https://www.generacodice.com/en/articolo/3109569/is-there-a-difference-between-making-a-composite-foreign-key-for-all-columns-or-a-foreign-key-for-each-column
  foreign-key
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