19 relations: Array data structure, Christopher J. Date, Column (database), Data domain, Database normalization, Edgar F. Codd, Hugh Darwen, International Standard Book Number, Isomorphism, Null (SQL), Relation (database), Relational database, Relational model, Second normal form, SQL, SQL:2003, Third normal form, Tuple, View (SQL).
In computer science, an array data structure, or simply an array, is a data structure consisting of a collection of elements (values or variables), each identified by at least one array index or key.
Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.
The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.
Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.
Christmas traditions vary from country to country.
Chris Date (born 1941) is an independent author, lecturer, researcher, and consultant, specializing in relational database theory.
In a relational database, a column is a set of data values of a particular simple type, one value for each row of the database.
In data management and database analysis, a data domain refers to all the values which a data element may contain.
Database normalization is the process of restructuring a relational database in accordance with a series of so-called normal forms in order to reduce data redundancy and improve data integrity.
Edgar Frank "Ted" Codd (19 August 1923 – 18 April 2003) was an English computer scientist who, while working for IBM, invented the relational model for database management, the theoretical basis for relational databases and relational database management systems.
Hugh Darwen is a computer scientist who was an employee of IBM United Kingdom from 1967.
The International Standard Book Number (ISBN) is a unique numeric commercial book identifier.
In mathematics, an isomorphism (from the Ancient Greek: ἴσος isos "equal", and μορφή morphe "form" or "shape") is a homomorphism or morphism (i.e. a mathematical mapping) that can be reversed by an inverse morphism.
New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.
New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.
In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.
Null (or NULL) is a special marker used in Structured Query Language to indicate that a data value does not exist in the database.
In relational database theory, a relation, as originally defined by E. F. Codd, is a set of tuples (d1, d2,..., dn), where each element dj is a member of Dj, a data domain.
A relational database is a digital database based on the relational model of data, as proposed by E. F. Codd in 1970.
The relational model (RM) for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd, where all data is represented in terms of tuples, grouped into relations.
Second normal form (2NF) is a normal form used in database normalization.
SQL (S-Q-L, "sequel"; Structured Query Language) is a domain-specific language used in programming and designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).
SQL:2003 is the fourth revision of the SQL database query language.
Third normal form (3NF) is a normal form that is used in normalizing a database design to reduce the duplication of data and ensure referential integrity by ensuring that (1) the entity is in second normal form, and (2) all the attributes in a table are determined only by the candidate keys of that relation and not by any non-prime attributes.
In mathematics, a tuple is a finite ordered list (sequence) of elements.
In a database, a view is the result set of a stored query on the data, which the database users can query just as they would in a persistent database collection object.
2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.
2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.