Question

我对SQL还是很陌生，她试图将同一张表中的两列连接起来并格式化结果。

到目前为止，我的代码是：

Select LastName + FirstName as FullName
from Customers
order by FullName

我要加入的列是LastName，FirstName

结果的格式应为：全名，格式如下：

Doe，约翰

该代码仅应显示姓氏为M-Z的结果。任何帮助是极大的赞赏。我已附上下面的屏幕截图，以供参考。

https://i.stack.imgur.com/k6qpE.png

Answer 1

您可以使用计算列：

CREATE TABLE Customers(LastName NVARCHAR(100), FirstName NVARCHAR(100));
INSERT INTO Customers VALUES ('Doe', 'John'), ('Nagata', 'Naomi');

ALTER TABLE Customers ADD FullName AS (CONCAT(LastName, ', ', FirstName));

Select *
from Customers
where LastName LIKE '[M-Z]%'
order by FullName;

db<>fiddle demo

Answer 2

Select LastName +', '+ FirstName as FullName
from Customers
order by FullName

Answer 3

尝试一下

Select * from (select Firstname + ' ' + Lastname as Fullname from Students) a order by a.Fullname

Answer 4

尝试一下：

select 
    [LastName]+ ', '+[FirstName] as FullName
    from [db]
    where left([LastName],1) in (
    'M',
    'N',
    'O',
    'P',
    'Q',
    'R',
    'S',
    'T',
    'U',
    'V',
    'W',
    'X',
    'Y',
    'Z')

    order by FullName

    ;

如何连接来自同一表的两列并在SQL中格式化新列

4 个答案: