SQL无法连接

Question

我正在使用SQL Server 2008 R2并尝试运行以下命令：

SELECT CustCity AS City, Concat(CustLastName, \', \', CustFirstName) AS Customer
FROM Customers
ORDER BY CustCity, Customer

我收到的错误消息是：

  

Msg 102，Level 15，State 1，Line 1
  '，''附近的语法不正确。

据我所知，这就是Concat应该如何运作所以我不明白为什么这不起作用。

有人可以帮忙吗？

Answer 1

您可以尝试这样： -

SELECT CustCity AS City, CustLastName + '\' + CustFirstName AS Customer
FROM Customers
ORDER BY CustCity, Customer

SQL SERVER 2008中不存在CONCAT功能。

Answer 2

请改为：

SELECT CustCity AS City, CustLastName + '\' + CustFirstName AS Customer
FROM Customers
ORDER BY CustCity, Customer

Answer 3

CONCAT()不是SQL Server 2008的功能。如果要在sql server中连接数据，则应使用+ sign：

SELECT CustCity AS City, CustLastName + ', ' + CustFirstName AS Customer
FROM Customers
ORDER BY CustCity, Customer;

见SQL Fiddle with Demo。如果要包含\，则可以使用：

SELECT CustCity AS City, CustLastName + ' \ ' + CustFirstName AS Customer
FROM Customers
ORDER BY CustCity, Customer

请参阅Demo

Answer 4

相当确定您的单引号'是导致问题的原因。问题是CONCAT仅存在于SQL 2012而不是2008中。

如果您使用的是SQL 2012，那么正确的语法就是。

Concat(CustLastName, '\', CustFirstName) AS Customer