Foreign keys are a data integrity feature of relational (and SQL) databases.
I use "ON DELETE CASCADE" regularly but I never use "ON UPDATE CASCADE" as I am not so sure in …
sql foreign-keys foreign-key-relationshipIf I am using the following SQL command in SQL Server 2008 to update a table with a foreign key constraint: …
sql-server-2008 foreign-key-relationshipWhat is the related_name argument useful for on ManyToManyField and ForeignKey fields? For example, given the following code, what …
python django many-to-many foreign-key-relationshipI have set up a table that contains a column with a foreign key, set to ON DELETE CASCADE (delete …
mysql foreign-keys foreign-key-relationshippublic class Foo { public string FooId{get;set;} public Boo Boo{get;set;} } public class Boo { public string BooId{get;…
c# entity-framework database-design foreign-key-relationshipI have a User < Country model. A user belongs to a country, but may not belong to any (null …
entity-framework mapping ef-code-first foreign-key-relationship entity-framework-4.1I have two tables Table1( FileID, BundledFileID, Domain) and Table2( FileID, FileType, FileName) In Table2 FileID and FileType are the …
sql-server-2005 foreign-key-relationship composite-primary-keyI have 2 tables as you will see in my posgresql code below. The first table students has 2 columns, one for …
sql postgresql foreign-keys relational-database foreign-key-relationshipI have 60 tables. I want to drop 10 tables where these 10 tables are Constraints(PK,FK) to other 20 tables. While dropping …
sql-server sql-server-2008 foreign-keys constraints foreign-key-relationshipI need to make some changes to a SQL Server 2008 database. This requires the creation of a new table, and …
sql sql-server foreign-keys foreign-key-relationship