Select语句问题

Question

我正在尝试select the top 1此选择查询然后订购DESC，我尝试的每一种方式，它似乎都不起作用。这是我的代码：

SELECT '$' + CONVERT(VARCHAR(50),
CONVERT(MONEY, COALESCE(([amount]), 0)),
1) AS [Total]
FROM [myTable] a
left join [mySecondTable]  b on a.[ID] = b.[ID]
left join [myThirdTable c on c.[myNumber] = b.[myNumber]

WHERE c.[myName] = 'me'

如果我想选择前1 amount，然后按amount与SELECT TOP 1和ORDER By [amount] DESC进行排序，我会在哪里准确地填写它们？或者这甚至是正确的方法吗？

Answer 1

你的ORDER BY将在最后，而在开头的前1位。

SELECT top 1 '$' + CONVERT(VARCHAR(50),
CONVERT(MONEY, COALESCE(SUM([amount]), 0)),
1) AS [Total]
FROM [myTable] a
left join [mySecondTable]  b on a.[ID] = b.[ID]
left join [myThirdTable c on c.[myNumber] = b.[myNumber]

WHERE c.[myName] = 'me'
order by [AMOUNT] DESC