一种将 2 个单独的查询组合成一个查询和 1 个表的方法？

Question

我想将 2 个单独的查询组合成一个查询，并能够将它们排序到 1 个表中。

这是我要结合的代码

SELECT 
    t1.CompanyName as 'Customer Company Name', 
    t1.ContactName, t1.ContactTitle, t1.City, t1.Country, t1.Phone 
FROM 
    Customers t1
WHERE 
    t1.Country = 'Germany'
ORDER BY 
    t1.City;

SELECT 
    t2.CompanyName as 'Supplier Company Name', 
    t2.ContactName, t2.ContactTitle, t2.City, t2.Country, t2.Phone 
FROM 
    Suppliers t2
WHERE 
    t2.Country = 'Germany'
ORDER BY 
    t2.City;

我还需要区分他们是表中的供应商还是客户。 有没有办法显示该行的数据来自哪里？

我希望得到这样的东西

Company Name | Contact Name | Phone       | Table of Origin
-------------+--------------+-------------+-----------------
Target         Steven        111-111-1111  Customer
Factory Name   Connor        222-222-2222  Supplier

Answer 1

我想你只想要union all ：

SELECT t1.CompanyName, t1.ContactName, t1.Phone, 'Customers' as which
FROM Customers t1
WHERE t1.Country = 'Germany'
UNION ALL
SELECT t2.CompanyName, t2.ContactName, t2.Phone, 'Suppliers' as which
FROM Suppliers t2
WHERE t2.Country = 'Germany';