sql - SQL：如何使用 DateDiff + ORDER BY 和 INNER JOIN

Question

这是我现有的 SQL 语句：

SELECT TOP 10 Users.FirstName + ' ' + Users.LastName AS Name,
              Feeds.LogType,
              Feeds.LogDesc,
              Feeds.Timestamp = DATEDIFF(MINUTE, Feeds.Timestamp, CURRENT_TIMESTAMP)
FROM Feeds
INNER JOIN Users ON Feeds.UserID = Users.UserID
ORDER BY Feeds.Timestamp DESC

我在第二行有错误，Incorrect syntax near '='.

任何想法如何解决这一问题？

Answer 1

尝试

SELECT TOP 10 Users.FirstName + ' ' + Users.LastName AS NAME
    ,Feeds.LogType
    ,Feeds.LogDesc
    ,DATEDIFF(MINUTE, Feeds.TIMESTAMP, CURRENT_TIMESTAMP)
FROM Feeds
INNER JOIN Users ON Feeds.UserID = Users.UserID
ORDER BY DATEDIFF(MINUTE, Feeds.TIMESTAMP, CURRENT_TIMESTAMP) DESC

Answer 2

Feeds.Timestamp = DATEDIFF(MINUTE, Feeds.Timestamp, CURRENT_TIMESTAMP) should be

DATEDIFF(MINUTE, Feeds.Timestamp, CURRENT_TIMESTAMP) AS Timestamp 

Answer 3

而不是 = 尝试别名为，

SELECT TOP 10 Users.FirstName + ' ' + Users.LastName AS Name, Feeds.LogType,
    Feeds.LogDesc,
    DATEDIFF(MINUTE, Feeds.Timestamp, CURRENT_TIMESTAMP) [Timestamp]
FROM Feeds INNER JOIN Users ON Feeds.UserID = Users.UserID
ORDER BY Feeds.Timestamp DESC

Answer 4

您可以以“alias = value”的方式使用别名，但您不应该指定表名，所以

Timestamp = DATEDIFF(MINUTE, Feeds.Timestamp, CURRENT_TIMESTAMP)