SQL Pivot表错误使用变量给出语法错误

嗨，我的同事带着这个错误来找我，现在我被迷住了，并试图找出它，希望一些专家能帮助我们！ 非常感谢！ 当我执行步骤6时，我们得到以下错误：

Msg 102, Level 15, State 1, Line 4
Incorrect syntax near '@cols'.

---

---

不幸的是，您需要动态SQL来实现这一点

declare @dyn nvarchar(max)
set @dyn = 'SELECT *
FROM (SELECT *
FROM Product) p
PIVOT (SUM(QTY) FOR CUST IN ('  +  @cols +')) as pvt
Order by Product
'
exec sp_executesql @dyn

---

@马丁·史密斯将是对的……当你遇到下一个错误时。：-）

至于@cols附近的错误，我认为您可以将整个内容用括号括起来。例如：

select @cols = (
                   STUFF(( SELECT DISTINCT TOP 100 PERCENT
                                '],[' + b.Cust
                           FROM    (select top 100 Cust
                                    from tblProduct)b
                           ORDER BY '],[' + b.Cust
                           FOR XML PATH('')
                        ), 1, 2, '') + ']'
               )

---

+1用于发布有用的DDL+1是的！我同意马丁的观点！

select @cols = (
                   STUFF(( SELECT DISTINCT TOP 100 PERCENT
                                '],[' + b.Cust
                           FROM    (select top 100 Cust
                                    from tblProduct)b
                           ORDER BY '],[' + b.Cust
                           FOR XML PATH('')
                        ), 1, 2, '') + ']'
               )