DRI meaning in Space Science ?

Answer:

What is Declarative Referential Integrity mean?

Referential integrity is a property of data stating that all its references are valid. In the context of relational databases, it requires that if a value of one attribute (column) of a relation (table) references a value of another attribute (either in the same or a different relation), then the referenced value must exist.

For referential integrity to hold in a relational database, any column in a base table that is declared 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 is used it must reference a valid, existing primary key in the parent table. For instance, deleting a record that contains a value referred to by a foreign key in another table would break referential integrity. Some relational database management systems (RDBMS) can enforce referential integrity, normally either by deleting the foreign key rows as well to maintain integrity, or by returning an error and not performing the delete. Which method is used may be determined by a referential integrity constraint defined in a data dictionary.

The adjective 'referential' describes the action that a foreign key performs, 'referring' to a linked column in another table. In simple terms, 'referential integrity' guarantees that the target 'referred' to will be found. A lack of referential integrity in a database can lead relational databases to return incomplete data, usually with no indication of an error.

reference

Full Form	Category
Desert Research Institute	Academic & Science
Davidson Research Initiative	Academic & Science
De Ridder (la)	Airport Code
Differential Rate of Interest	Banking
Darden Restaurants, Inc.	Business
Definition Resolution And Interpretation	Business
Development Resources Inc	Business
Data Resources Inc	Business
Direct Reduced Iron	Chemistry
Direct Relief International	Community
Diabetes Research Institute	Community
Dirty Rotten Imbeciles	Community
Dynamic Respiration Index	Community
Disable Random Interrupt	Computer Assembly Language
Dynamic Range Increment	Computer Hardware
Direct Received Invoice	Computing
Digital Research Inc.	Computing
Data Recovery Interface	Computing
Data Routing Interface	Computing
Digital Receiver Interface	Computing
Dual Ring Interconnect	Computing
Dynamic Range Increase	Electronics
Dietary Reference Intakes	General
Domain Registration Interface	General
Dive Rescue International	General
Dive Rescue Intl	General
Differential Reinforcement of Incompatible	General
Dynamic Range Increased	General
Directly Responsible Individual	General
Detection Recognition and Identification	General
Detection Recognition Identification	General
Designated Response Individual	General
Downtown Revitalization Initiative	General
D retro Inverso	General
Defense Reform Initiative	General
Deposit Resistant Injector	General
Discrete Roughness Index	General
Driver Risk Index	General
Driver Risk Inventory	General
Development of Regional Impact	Governmental
Daily Reference Intake	Governmental
Development Research Institute	Governmental
Disaster Recovery Institute	Governmental
Defense Research Institute	Governmental
Directorate of Revenue Intelligence	Indian Ministry of Finance
DUMRI JUARA	Indian Railway Station
Direct Rendering Infrastructure	Information Technology
Dietary Reference Intake	Medical
Department Research Initiative	Medical
Delaware Rehabilitation Institute	Medical
Dopamine Reuptake Inhibitor	Medical
Disability Rights International	Medical
Direct Rendering Interface	Networking
Differential Refractive Index	Physics Related
Davenport Rock Island and North Western RailRoad Company	Regional
Davenport, Rock Island and North Western Railway	Regional
Declarative Referential Integrity	Space Science
Data Rate Indicator	Space Science