A foreign key is a set of attributes in a table that refers to the primary key of another table, linking these two tables. In the context of relational...

Foreign Keys is the second album released in 1985 by musician Jandek, and his eleventh overall. This is the first Jandek album featuring a full band, and...

compound key is a composite key for which each attribute that makes up the key is a foreign key in its own right.[citation needed] Composite keys have advantages...

key. Rows in a table can be linked to rows in other tables by adding a column for the unique key of the linked row (such columns are known as foreign...

A surrogate key (or synthetic key, pseudokey, entity identifier, factless key, or technical key[citation needed]) in a database is a unique identifier...

designation of a primary key may indicate the "preferred" identifier for data in the table, or that the primary key is to be used for foreign key references from...

another state Foreign accent syndrome, a side effect of severe brain injury Foreign key, a constraint in a relational database Foreign film or world cinema...

a foreign key can only contain either null values or values from a parent table's primary key or a candidate key. In other words, when a foreign key value...

DBMSs only allow a foreign key constraint against a primary key but most systems will allow a foreign key constraint to reference any key of a table. The...

special cases of constraints are expressed as keys and foreign keys: A candidate key, or simply a key, is the smallest subset of attributes guaranteed...

columns chosen to be the primary key should be unique and not null. Referential integrity concerns the concept of a foreign key. The referential integrity rule...

properties, automatically updatable views, materialized views, triggers, foreign keys, and stored procedures. It is supported on all major operating systems...

being described. The attribute or parameter: typically implemented as a foreign key into a table of attribute definitions. The attribute definitions table...

Department.DepartmentID is the primary key of the Department table, whereas Employee.DepartmentID is a foreign key. Note that in Employee, "Williams" has...

key to foreign key relationship between two tables, where the record in the first table can relate to multiple records in the second table. A foreign...

that are a foreign key to dimension tables. The primary key of a fact table is usually a composite key that is made up of all of its foreign keys. Fact tables...

database invariant is referential integrity, which guarantees the primary key–foreign key relationship. Transactions are often executed concurrently (e.g., multiple...

therefore, it must use a foreign key in conjunction with its attributes to create a primary key. The foreign key is typically a primary key of an entity it is...

keys, with the tenure key and the popular vote majority key both replaced by the party mandate key and the foreign/military failure and success keys being...

codes. For example, a person's sex may be Female, Male or Non-Binary. Foreign-key constraints: This is the more general case of set membership. The set...

expanding circle of nations. The foreign relations of Ukraine are guided by a number of key priorities outlined in the foreign policy of Ukraine. Ukraine considers...

possible, but one cannot use Supplier_Code as foreign key on Product table and using Supplier_Key as foreign key each product is tied on specific time slice...

a foreign key is a column in another table that refers to a primary key. Keys can comprise several columns, in which case they are composite keys. In...

persistence tools and in object–relational mapping (ORM). Typically, foreign key relationships will be exposed as an object instance of the appropriate...

category of 'Vehicles' and a child of 'Cars' with a child of 'Mercedes', a foreign key table relationship must be established unless the tree table is natively...

provides the standard ACID-compliant transaction features, along with foreign key support (declarative referential integrity). It is included as standard...

sold, such as foreign currency symbols, typographic marks and accented letters. On a typical Windows-compatible PC keyboard, the AltGr key, when present...

non-autoincrementing Integer Primary Keys.[failed verification] Version 3.6.19 released on October 14, 2009 added support for foreign key constraints. Stored procedures...

primary key of the containing relations and will therefore be appended as foreign key to the new relation: In the modified structure, the primary key is {Customer...

"ReportsTo" column. In Relational database terms, the ReportsTo column is a foreign key referencing the EmpNo column. If the "child" data type were different...