Sql

Search

what is a foriegn key

A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables. It acts as a cross-reference between tables because it references the primary key of another table, thereby establishing a link between them.

The majority of tables in a relational database system adhere to the foreign key concept. In complex databases and data warehouses, data in a domain must be added across multiple tables, thus maintaining a relationship between them. The concept of referential integrity is derived from foreign key theory.

Foreign keys and their implementation are more complex than primary keys.

Comment

PREVIOUS	NEXT

Code Example
Sql :: ORACLE RANGE DATE USING CONNECT BY PER WEEK,MONTHS,ETC
Sql :: save_details_inrichting
Sql :: <sql:datasource var="Snapsho"
Sql :: sqlites studio red exclamation mark when poening databse
Sql :: select 1 from orders
Sql :: fonction stockée sql
Sql :: sqlite headers
Sql :: sql date range
Sql :: Reduce size of SQL server log file truncate - Source :NAYCode.com
Sql :: which lock mode is not available in sql
Sql :: mysql configuration file storage location
Sql :: sql select students closest in score
Sql :: oracle query archivemode
Sql :: strat with in sql
Sql :: insert thai language sql server
Sql :: look at running processes redshift
Sql :: update values in select statement sql
Sql :: online convert linq to sql query
Sql :: sqlx many to many join
Sql :: Error Code: 1290. The MySQL server is running with the --secure-file-priv option so it cannot execute this statement
Sql :: create database ms sql server
Sql :: sql check if a record exists
Sql :: remove accented characters in bigquery
Sql :: ssms keyboard shortcuts
Sql :: mysql listing get a particu particular user firsdt
Csharp :: read text file to string c#
Csharp :: c# create a text file
Csharp :: how to delete all files in a directory c#
Csharp :: write string multiple times c#
Csharp :: unix time c#

Search

SQL

what is a foriegn key

ADD CONTENT