我在看這個網站:幫助,存儲過程
set nocount on
DECLARE @endDate date
SELECT @endDate = max(CreationDate) from Posts
set nocount off
SELECT TOP 50
Id AS [User Link], Reputation, Days,
Reputation/Days AS RepPerDays
FROM (
SELECT *,
CONVERT(int, @endDate - CreationDate) as Days
FROM Users
) AS UsersAugmented
WHERE
Reputation > 5000
ORDER BY
RepPerDays DESC
我也是SQL初學者。我有關於此代碼的以下問題:
- 是這個mysql或mssql?
- 這是幹什麼的?
set nocount off
- 爲什麼在括號內?
[User Link]
- 這是幹什麼的?
CONVERT(int, @endDate - CreationDate) as Days
謝謝!受影響的返回,你不希望有行總數