Question

伙计我有一个简单的查询，它从表Notice返回3行（部门名称的Department表上的内连接）除了3个最新行（基于通知的发布日期）

这是查询：

SELECT TOP (3) n.NoticeID, 
    [Subject],
    n.IssueDate,
    d.DepartName AS 'Department',
    n.Body, 
    n.NoticeImage, 
    n.Icon 
FROM dbo.Notice n INNER JOIN dbo.Department d ON  d.DepartmentID = n.DepartmentID
WHERE n.NoticeID NOT IN (SELECT TOP 3 n.NoticeID FROM dbo.Notice n INNER JOIN 
dbo.Department d ON d.DepartmentID = n.DepartmentID
ORDER BY IssueDate DESC) ORDER BY n.IssueDate DESC

现在我要做的是，获取返回的最后一行的NoticeID .. 例如，如果返回的Data有3行，其中NoticeID为25,24,21 ......我想从查询中获取NoticeID = 21（返回的最后一行的NoticeID）。我该怎么做？

Answer 1

您可以进行子查询以获取最后一个NoticeID，如下所示

Select Min(NoticeiID) From
(
SELECT TOP (3) n.NoticeID, 
    [Subject],
    n.IssueDate,
    d.DepartName AS 'Department',
    n.Body, 
    n.NoticeImage, 
    n.Icon 
FROM dbo.Notice n INNER JOIN dbo.Department d ON  d.DepartmentID = n.DepartmentID
WHERE n.NoticeID NOT IN (SELECT TOP 3 n.NoticeID FROM dbo.Notice n INNER JOIN 
dbo.Department d ON d.DepartmentID = n.DepartmentID
ORDER BY IssueDate DESC) ORDER BY n.IssueDate DESC
) as T1

如何从3组返回的行中获取最后一个ID？

1 个答案: