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n.Alias, pseudonym

adv.A pseudonym; known by a pseudonym; an alias; an alias also known by Called

plural: aliases

mysql Alias ??operator syntax

Function:Specify aliases for column names and table names

Syntax: SELECT column_name(s) FROM table_name AS alias_name

mysql Alias ??operator example

//假設(shè)我們有兩個表分別是："Persons" 和 "Product_Orders"。我們分別為它們指定別名 "p" 和 "po"。列出 "John Adams" 的所有定單
SELECT po.OrderID, p.LastName, p.FirstName FROM Persons AS p, Product_Orders AS po WHERE p.LastName='Adams' AND p.FirstName='John';