基于 ID 的 SQL 偏移量

Question

尝试根据用户 ID 查找 3 行。

结果应该与当前用户和前后行偏移：

87. John Snow 1000p
88. YOU 990p
89. Jane Doe 900p

我将用户变量存储在@currentUser 中，并使用以下查询获取所有相关操作：

SELECT u.UserID, 
       u.ContentID,  
       (u.FirstName + ' ' + u.LastName) AS theUser, 
       SUM( l.Action ) as thePoints 
FROM   [AccessLog] l 
       LEFT JOIN [User] u 
           ON l.UserID = u.UserID 
WHERE  l.Action = 13 
       OR l.Action = 2 
       AND l.Timestamp BETWEEN CONVERT(datetime, '2014-09-01') AND CONVERT(datetime, '2014-09-11') 
GROUP BY u.UserID, 
       u.ContentID, 
       u.FirstName, 
       u.LastName 
ORDER BY thePoints DESC

我将如何列出例如。 #87 到 #89 如果我的位置是 #88？

Answer 1

您应该查看OFFSET 和FETCH FIRST，尽管我认为这取决于您使用的数据库版本。

SELECT u.UserID, 
       u.ContentID,  
       (u.FirstName + ' ' + u.LastName) AS theUser, 
       SUM( l.Action ) as thePoints 
FROM   [AccessLog] l 
       LEFT JOIN [User] u 
           ON l.UserID = u.UserID 
WHERE  l.Action = 13 
       OR l.Action = 2 
       AND l.Timestamp BETWEEN CONVERT(datetime, '2014-09-01') AND CONVERT(datetime, '2014-09-11') 
GROUP BY u.UserID, 
       u.ContentID, 
       u.FirstName, 
       u.LastName 
ORDER BY thePoints DESC
offset 87 rows
fetch first 3 rows only