Question

我想从[To]表中的行更新[From]表中的行，其中键是相等的。所以这就是我要做的事情：

UPDATE [To]
SET    [To].[Name]      = [From].[Name],
       [To].[Size]      = [From].[Size],
       [To].[Something] = [From].[Something]
FROM   [From]
WHERE  [To].[Id] = [From].[Id];
go

问题是，CE doesn't support FROM in the UPDATE command。

那么，如何更改此语法以在CE中工作？

Answer 1

尝试以下代码段（未经测试） -

UPDATE [To]
SET    [To].[Name]      = [From].[Name],
       [To].[Size]      = [From].[Size],
       [To].[Something] = [From].[Something]
WHERE EXISTS (SELECT 1 FROM [FROM] WHERE [To].[Id] = [From].[Id])

Answer 2

更新到设置为.fld1 = from1.fld1 从table1到内部连接表from1 on to.id = from1.id

UPDATE table1 FROM table2（使用Sql Server Compact）

2 个答案: