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- этимология
Что (кто) такое group-by - определение
SQL KEYWORD
GROUP BY (SQL); GROUP BY; Group by
Найдено результатов: 20425
Group by (SQL)
A GROUP BY statement in SQL specifies that a SQL SELECT statement partitions result rows into groups, based on their values in one or several columns. Typically, grouping is used to apply some sort of aggregate function for each group.
Free-by-cyclic group
Free by cyclic; Free by cyclic group
In group theory, especially, in geometric group theory, the class of free-by-cyclic groups have been deeply studied as important examples. A group G is said to be free-by-cyclic if it has a free normal subgroup F such that the quotient group G/F is cyclic.
Group (military unit)
GENERIC MILITARY UNIT SIZE DESIGNATION
Group (air force unit); Air group; Air force group; Group (air force); Groupe; Group (military aviation unit); Group (British Army)
A group is a military unit or a military formation that is most often associated with military aviation.
Cultivar group
GROUPING USED FOR CULTIVATED PLANTS
Group (Botany); Cultivar Group; Cultivar groups; Group (horticulture); Group (botany)
A Group (previously cultivar-groupInternational Code of Nomenclature for Cultivated Plants, 4th edition (1969), 5th edition (1980) and 6th edition (1995)) is a formal category in the International Code of Nomenclature for Cultivated Plants (ICNCP) used for cultivated plants (cultivars) that share a defined characteristic. It is represented in a botanical name by the symbol Group or Gp.
Group (auto racing)
FIA RACING CAR CLASSIFICATION
Group (Auto Racing); Group (Auto racing)
A FIA Group is a category of car allowed to compete in auto racing. The FIA Appendix J to the international motor sports code defines the various Groups.
List of Chinese administrative divisions by ethnic group
WIKIMEDIA LIST ARTICLE
List of China administrative regions by ethnic group; List of China administrative divisions by ethnic group
The list below outlines the distribution of the nationalities of China among provinces and province-level entities of the People's Republic of China (P.R.
Users' group
![A hackers' talk at [[Chaos Constructions]] 2019](https://commons.wikimedia.org/wiki/Special:FilePath/Chaos Constructions 2019 hackers talk.jpg?width=200 "A hackers' talk at [[Chaos Constructions]] 2019")
TYPE OF CLUB FOCUSED ON THE USE OF A PARTICULAR TECHNOLOGY
User group; Computer user group; Computer User Group; User Group; Users group; Computer-club; Computer club (user group); Software user group; Specialist group
A users' group (also user's group or user group) is a type of club focused on the use of a particular technology, usually (but not always) computer-related.
Grammy Award for Best Performance by a Vocal Group
Best Performance by a Vocal Group
The Grammy Award for Best Performance by a Vocal Group was awarded from 1961 to 1968. In its first year, the award specified that a "vocal group" contains two to six artists.
user group
TYPE OF CLUB FOCUSED ON THE USE OF A PARTICULAR TECHNOLOGY
User group; Computer user group; Computer User Group; User Group; Users group; Computer-club; Computer club (user group); Software user group; Specialist group
(user groups)
A user group is a group of people with the same interests, who use a particular product or service.
PLATFORM is an alliance of more than 80 rail-user groups.
...the IBM PC User Group.
N-COUNT
Group (computing)
GROUPING OF USERS IN COMPUTING AS A WAY TO SIMPLIFY ACCESS CONTROL TO COMPUTER SYSTEMS
Groups (Unix); Group (Unix)
In computing, the term group generally refers to a grouping of users. In principle, users may belong to none, one, or many groups (although in practice some systems place limits on this.
Википедия
Group by (SQL)
A GROUP BY statement in SQL specifies that a SQL SELECT statement partitions result rows into groups, based on their values in one or several columns. Typically, grouping is used to apply some sort of aggregate function for each group.
The result of a query using a GROUP BY statement contains one row for each group. This implies constraints on the columns that can appear in the associated SELECT clause. As a general rule, the SELECT clause may only contain columns with a unique value per group. This includes columns that appear in the GROUP BY clause as well as aggregates resulting in one value per group.
