sql - 搜索 SQL 短语的精确术语

Question

我正在尝试记录一些 SQL 并希望获得正确的术语。如果你这样写 SQL；

select child.ID, parent.ID
from hierarchy child 
inner join hierarchy parent 
on child.parentId = parent.ID

然后你有一个实际的表('层次')，你给了两个名字('父'和'子')我的问题是关于你如何引用带有名称的表的逻辑实体。

你会在这个名字的空白处写什么？

“此查询使用一个表(层次结构)，但使用两个 _ (子级和父级)”

[编辑] 在问题中留下了以前的草稿。现在更正了。

Answer 1

在 SQL Server 文档中，该术语是 table_source :

Specifies a table, view, or derived table source, with or without an alias, to use in the Transact-SQL statement

在 BNF 语法中，它是:

<table_source> ::= 
{
        table_or_view_name [ [ AS ] table_alias ] [ <tablesample_clause> ] 
        [ WITH ( < table_hint > [ [ , ]...n ] ) ] 
    | rowset_function [ [ AS ] table_alias ] 
        [ ( bulk_column_alias [ ,...n ] ) ] 
        | user_defined_function [ [ AS ] table_alias ] [ (column_alias [ ,...n ] ) ]
    | OPENXML <openxml_clause> 
    | derived_table [ AS ] table_alias [ ( column_alias [ ,...n ] ) ] 
    | <joined_table> 
    | <pivoted_table> 
    | <unpivoted_table>
      | @variable [ [ AS ] table_alias ]
        | @variable.function_call ( expression [ ,...n ] ) [ [ AS ] table_alias ] [ (column_alias [ ,...n ] ) ]