如何加入表格并更改返回列的名称？

Question

我有一个MS SQL 2008的表称为“水果”，看起来像这样：

id name   category_id 
-- ------------ ----------- 
1 Apples     4 
2 Bananas     6 
3 Crackers     6 

和所谓的“类别”与另一个表：

id category_name 
-- ------------- 
4 Foo 
6 Bar 

如何产生一个查询，将返回的结果是这样的：（列必须正好这个名字，因为我想写一个CSV）

fruit_name fruit_category_name 
---------- ------------------- 
Apples  Foo 
Bananas  Bar 
Crackers Bar 

Answer 1

SELECT f.name AS fruit_name, c.category_name AS fruit_category_name 
FROM fruits AS f 
INNER JOIN categories AS c ON c.id = f.category_id 

Answer 2

select name as fruit_name, category_name as fruit_category_name 
from fruits 
inner join categories on (fruits.category_id = categories.id) 
order by fruit_name 

Answer 3

试试这个：

SELECT f.name AS fruit_name, c.category_name AS fruit_category_name 
FROM fruits f INNER JOIN categories c 
ON f.id = c.id 
ORDER BY f.name 

Answer 4

SELECT fruits.name AS fruit_name, categories.category_name AS fruit_category_name FROM fruits INNER JOIN categories ON (fruits.category_id = categories.category_name) 

Answer 5

像这样的事情？：

SELECT 
    f.name AS fruit_name, 
    c.category_name AS fruit_category_name 
FROM 
    fruits f 
JOIN 
    categories c ON c.id = f.category_id 
ORDER BY 
    fruit_name DESC 

Answer 6

您可以通过以下两种方式之一重命名列：

SELECT 
    ColumnName AS DisplayName 
    FROM ... 

或

SELECT 
    DisplayName = ColumnName 
    FROM ... 

记住，使用[和]如果你需要使用特殊字符（如空格）的显示名称中：

SELECT 
    ColumnName AS [Display Name] 
    FROM ... 

或

SELECT 
    [Display Name] = ColumnName 
    FROM ... 

你可以做你的加入是这样的：

SELECT 
    f.name AS fruit_name 
     ,c.category_name AS fruit_category_name 
    FROM Fruits    f 
    INNER JOIN Categories c ON c.id=f.category_id