使用 UNION 的查询中的一个析取项的正确术语是什么？

Question

完成句子：在查询中

SELECT 0 UNION ALL SELECT 1;

子选择 SELECT 0 和 SELECT 1 被恰当地称为 UNION 的 ___________s。

我不是在寻找您对什么是好名字的意见 - 我希望您参考某种权威来源来支持您的回答。

Answer 1

我会说“结果集”。

A UNION concatenates result sets from two queries. But a UNION does not create individual rows from columns gathered from two tables.

从这里开始： https://docs.microsoft.com/en-us/sql/t-sql/language-elements/set-operators-union-transact-sql?view=sql-server-ver15

Answer 2

Oracle's documentation 将它们称为“组件查询”。

Answer 3

如果我正确理解标准 SQL 文档，这似乎叫做 <query term>。

网上很难找到SQL:20xx，Itzik Ben-Gan在Fundamentals of table expressions

中展示了相关部分

7.17 <query expression>
 

Function
Specify a table.
 

Format
  <query expression> ::=
    [ <with clause> ] <query expression body>
      [ <order by clause> ] [ <result offset clause> ] [ <fetch first clause> ]
  <with clause> ::=
    WITH [ RECURSIVE ] <with list>
  <with list> ::=
    <with list element> [ { <comma> <with list element> }… ]
  <with list element> ::=
    <query name> [ <left paren> <with column list> <right paren> ]
      AS <table subquery> [ <search or cycle clause> ]
  <with column list> ::=
    <column name list>
  <query expression body> ::=
      <query term>
    | <query expression body> UNION [ ALL | DISTINCT ]
        [ <corresponding spec> ] <query term>
    | <query expression body> EXCEPT [ ALL | DISTINCT ]
        [ <corresponding spec> ] <query term>
  <query term> ::=
      <query primary>
    | <query term> INTERSECT [ ALL | DISTINCT ]
        [ <corresponding spec> ] <query primary>
  <query primary> ::=
      <simple table>
    | <left paren> <query expression body>
        [ <order by clause> ] [ <result offset clause> ] [ <fetch first clause> ]
        <right paren>
  <simple table> ::=
      <query specification>
    | <table value constructor>
    | <explicit table>
  <explicit table> ::=
    TABLE <table or query name>
  <corresponding spec> ::=
    CORRESPONDING [ BY <left paren> <corresponding column list> <right paren> ]
  <corresponding column list> ::=
    <column name list>
  <order by clause> ::=
    ORDER BY <sort specification list>
  <result offset clause> ::=
    OFFSET <offset row count> { ROW | ROWS }
  <fetch first clause> ::=
    FETCH { FIRST | NEXT } [ <fetch first quantity> ] { ROW | ROWS } { ONLY | WITH TIES }
  <fetch first quantity> ::=
      <fetch first row count>
    | <fetch first percentage>
  <offset row count> ::=
    <simple value specification>
  <fetch first row count> ::=
    <simple value specification>
  <fetch first percentage> ::=
    <simple value specification> PERCENT

使用 UNION 的查询中的一个析取项的正确术语是什么？

What is the proper term for one of the disjuncts in a query using UNION?

sql

union

terminology