Sql Update语句和子查询

我想使用子查询来确定是否应该对OrderClosed状态进行更新。但我似乎不能正确地理解这一点

Update Orders 
set orderclosed = 1 
where (
SELECT dbo.orders.ordernr, 
   dbo.orders.orderdate, 
   dbo.orders.salesdate, 
   dbo.orders.deliverydate, 
   dbo.orders.orderclosed, 
   dbo.invoices.invoicenr 
FROM   dbo.orders 
   LEFT OUTER JOIN dbo.invoices 
                ON dbo.orders.id = dbo.invoices.orderid 
WHERE  dbo.invoices.invoicenr IS NOT NULL 
   AND orderclosed = 0 )

还是我想简单点？

试试这个：

Update Orders 
 set orderclosed = 1 
 where ordernr in 
 (
     SELECT dbo.orders.ordernr
     FROM   dbo.orders 
     LEFT OUTER JOIN dbo.invoices 
         ON dbo.orders.id = dbo.invoices.orderid 
     WHERE  dbo.invoices.invoicenr IS NOT NULL 
     AND orderclosed = 0 
 );`

Update o 
    set orderclosed = 1 
FROM dbo.orders o JOIN
     dbo.invoices i
     ON o.id = i.orderid 
WHERE i.orderid IS NOT NULL AND orderclosed = 0;

where子句需要有类似于

where VARIABLE\u NAME IN（变量名值列表）

---

您正在尝试使用类似于

WHERE（多个变量名和值的列表）的语法
SQL Server中
更新
中的
连接的语法不使用
WHERE
子句。试试这个：

Update o 
    set orderclosed = 1 
FROM dbo.orders o JOIN
     dbo.invoices i
     ON o.id = i.orderid 
WHERE i.orderid IS NOT NULL AND orderclosed = 0;

还要注意以下两个变化。首先，
左联接
现在是一个
内部联接
，因为您希望在
发票
中找到匹配的记录（基于
where
子句）。这个版本使用表别名来简化查询的编写（和读取）。
@Lodendijk。我不知道为什么我漏掉了列名，但这显然是
where
子句所需要的。