Question

我能够在MS Access中运行以下代码，该代码能够在“NodeForce”表中添加新行。

INSERT INTO [NodeForce] (nodeID, mem1, mem1min) 
SELECT '1113', '1752-1', [Row_ID] 
FROM [Element Forces - Frames] WHERE [FrameElem] = '1752-1' 
AND [OutputCase] = 'Case2' AND [ElemStation] = 0

但是，当我添加一个额外的子查询时，例如：

INSERT INTO [NodeForce] (nodeID, mem1, mem1min, mem1max) 
SELECT '1113', '1752-1', [Row_ID] 
FROM [Element Forces - Frames] WHERE [FrameElem] = '1752-1' 
AND [OutputCase] = 'Case2' AND [ElemStation] = 0,
[Row_ID] FROM [Element Forces - Frames] WHERE [FrameElem] = '1752-1' 
AND [OutputCase] = 'Case6' AND [ElemStation] = 12

它会产生错误“查询值和目标字段的数量不同”。

如何使用不同的子查询插入多个值？

我也尝试过：

INSERT INTO ...
VALUES ('1113', '1752-1', (SELECT ... FROM ...), (SELECT ... FROM ...))

然后给了我一个错误，说“查询输入必须包含至少一个表或查询”

提前感谢您的帮助！

Answer 1

解析您的查询：

INSERT INTO [NodeForce] (nodeID, mem1, mem1min, mem1max) 
SELECT '1113', '1752-1', [Row_ID] 
FROM [Element Forces - Frames] WHERE [FrameElem] = '1752-1' 
AND [OutputCase] = 'Case2' AND [ElemStation] = 0

您正在向4列插入3个值，因此消息为"Number of query values and destination fields are not the same."

下面的那个没有SELECT，并且在SELECT语句之后有三个值而不是在第一个[Row_ID]语句的SELECT之后。

,[Row_ID] FROM [Element Forces - Frames] WHERE [FrameElem] = '1752-1' 
AND [OutputCase] = 'Case6' AND [ElemStation] = 12

因此，您需要的是将列数与您的值相匹配您需要将第二个SELECT作为第一个查询的一部分的子查询并且只会返回1个值，例如：

INSERT INTO [NodeForce] (nodeID, mem1, mem1min, mem1max) 
SELECT '1113', '1752-1', [Row_ID], (SELECT
[Row_ID] FROM [Element Forces - Frames] WHERE [FrameElem] = '1752-1' 
AND [OutputCase] = 'Case6' AND [ElemStation] = 12 LIMIT 1) 
FROM [Element Forces - Frames] WHERE [FrameElem] = '1752-1' 
AND [OutputCase] = 'Case2' AND [ElemStation] = 0

其中：

(SELECT
[Row_ID] FROM [Element Forces - Frames] WHERE [FrameElem] = '1752-1' 
AND [OutputCase] = 'Case6' AND [ElemStation] = 12 LIMIT 1)

用于mem1max，这是一个只返回1个值的子查询是第4个匹配您的列数4的值。

SQL插入多个子查询

1 个答案: