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mysql as与Alias别名用法详解

① 表的SQL Alias 语法

 代码如下 复制代码

SELECT column_name(s) FROM table_name AS alias_name

例子:

 代码如下 复制代码

SELECT po.OrderID, p.LastName, p.FirstNameFROM Persons AS p, Product_Orders AS poWHERE p.LastName='Adams' AND p.FirstName='John'

② 列的SQL Alias 语法

 代码如下 复制代码

SELECT column_name AS alias_name FROM table_name

例子:

 代码如下 复制代码

SELECT LastName AS Family, FirstName AS Name FROM Persons

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