system used to maintain relational databases is a relational database management system (RDBMS). Many relational database systems are equipped with the option...
32 KB (3,839 words) - 20:18, 9 September 2024
Carrier's constraint on lung function in long thin animals Finite domain constraint, in mathematical solution-finding Integrity constraints in databases Check...
3 KB (280 words) - 23:47, 7 September 2024
and tables (relations) of a database to ensure that their dependencies are properly enforced by database integrity constraints. It is accomplished by applying...
36 KB (2,852 words) - 20:00, 17 July 2024
to police this constraint. Many database systems require that both referencing and referenced sets of columns in a FOREIGN KEY constraint are indexed, thus...
17 KB (2,458 words) - 13:15, 1 June 2024
Data integrity (redirect from Integrity constraints)
is normally enforced in a database system by a series of integrity constraints or rules. Three types of integrity constraints are an inherent part of the...
19 KB (2,236 words) - 11:21, 5 March 2024
integrity constraints imposed on a database.[citation needed] These integrity constraints ensure compatibility between parts of the schema. All constraints are...
11 KB (1,082 words) - 11:25, 23 November 2023
DBMS, the database system or an application associated with the database. Small databases can be stored on a file system, while large databases are hosted...
75 KB (9,581 words) - 00:06, 13 September 2024
Relational model (redirect from Relational model of database management)
important for databases that might be used for a long time (perhaps several decades). This has made the idea and implementation of relational databases very popular...
30 KB (4,208 words) - 02:04, 6 September 2024
Constraint programming (CP) is a paradigm for solving combinatorial problems that draws on a wide range of techniques from artificial intelligence, computer...
17 KB (2,319 words) - 03:07, 24 July 2024
problems in other areas such as finite model theory and databases. Establishing whether a constraint satisfaction problem on a finite domain has solutions...
29 KB (4,485 words) - 11:31, 17 March 2024
immediately visible. Relational databases are traditionally composed of tables with fixed-size fields and records. Object databases comprise variable-sized blobs...
12 KB (1,550 words) - 12:27, 5 August 2024
very small number of constraints. There is always at least one constraint, and TOC uses a focusing process to identify the constraint and restructure the...
43 KB (5,953 words) - 00:13, 19 August 2024
check constraint is a type of integrity constraint in SQL which specifies a requirement that must be met by each row in a database table. The constraint must...
4 KB (555 words) - 19:59, 21 November 2023
Foreign key (redirect from Foreign key constraint)
tables. In the context of relational databases, a foreign key is subject to an inclusion dependency constraint that the tuples consisting of the foreign...
15 KB (2,109 words) - 21:42, 14 April 2024
Paris Kanellakis (category Database researchers)
lie in the fields of database theory—comprising work on deductive databases, object-oriented databases, and constraint databases—as well as in fault-tolerant...
53 KB (3,726 words) - 20:17, 6 August 2024
Referential integrity (redirect from Referential constraint)
Foundations of Databases. Addison-Wesley. pp. 192–199. Microsoft Support (2007-02-11). "Error message 1785 occurs when you create a FOREIGN KEY constraint that...
8 KB (960 words) - 09:42, 24 March 2024
intelligence and operations research, constraint satisfaction is the process of finding a solution through a set of constraints that impose conditions that the...
18 KB (2,018 words) - 13:27, 18 June 2024
Domain-key normal form (category Database normalization)
database that are not clear domain or key constraints. Most databases can easily test domain and key constraints on attributes. General constraints however...
6 KB (686 words) - 16:45, 27 March 2024
allowed ways. Any data written to the database must be valid according to all defined rules, including constraints, cascades, triggers, and any combination...
5 KB (482 words) - 04:29, 12 July 2024
NoSQL (redirect from Nonrelational databases)
SQL-like query languages or sit alongside SQL databases in polyglot-persistent architectures. Non-relational databases have existed since the late 1960s, but...
29 KB (2,404 words) - 22:55, 9 August 2024
graph databases, making them useful for heavily inter-connected data. Graph databases are commonly referred to as a NoSQL database. Graph databases are...
51 KB (4,647 words) - 10:51, 15 September 2024
Multivalued dependency (category Database constraints)
In database theory, a multivalued dependency is a full constraint between two sets of attributes in a relation. In contrast to the functional dependency...
8 KB (1,293 words) - 19:31, 18 August 2024
activity. Spatiotemporal databases are an extension of spatial databases and temporal databases. A spatiotemporal database embodies spatial, temporal...
4 KB (454 words) - 20:44, 10 February 2024
Query language (redirect from Database query language)
language for OLAP databases; N1QL is a Couchbase's query language finding data in Couchbase Servers; Object Query Language OCL (Object Constraint Language)....
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of database theory which studies implication and optimization problems related to logical constraints, commonly called dependencies, on databases. The...
1 KB (97 words) - 18:52, 24 April 2024
Unique key (redirect from Key (database))
The enforcement of a key constraint (i.e. a uniqueness constraint) in a table is also a data integrity feature of the database. The DBMS prevents updates...
10 KB (1,172 words) - 18:41, 25 April 2024
multiple noncontiguous databases with a single query—even if the constituent databases are heterogeneous. To this end, a federated database system must be able...
14 KB (1,750 words) - 16:37, 8 June 2024
ACID (redirect from Database consistency)
properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a sequence...
17 KB (2,089 words) - 18:30, 16 August 2024
Data definition language (redirect from Drop database)
definition: PRIMARY KEY ( [comma separated column list] ) Constraints: {CONSTRAINT} [constraint definition] RDBMS specific functionality An example statement...
9 KB (1,002 words) - 14:53, 13 May 2024
programming. Object databases are different from relational databases which are table-oriented. A third type, object–relational databases, is a hybrid of...
20 KB (2,324 words) - 06:07, 15 August 2024