如何在SQL Server 2014中查找僅具有多行的記錄？

Question

客戶在我們的車輛上有我們的帳戶。 有些帳戶有多輛車。

我只想創建一個具有多個車輛的帳戶報告（即多個帳戶ID和車牌號）。

表帳戶A
餐盤P
A.AccountId = P.AccountId

SELECT A.AccountNumber
      ,A.AccountId
      ,P.LicPlateNo

FROM Account A
INNER JOIN Plate P ON A.AccountId = P.AccountId

WHERE A.RegDate > '2017-01-01'
  AND (Select Count(P.LicPlateNo) GROUP BY A.AccountNumber) > 1
   -- HAVING Count(P.LicPlateNo) > 1 ????

ORDER BY A.AccountNumber

Answer 1

您可以直接使用

    SELECT A.AccountNumber
          ,A.AccountId
          ,P.LicPlateNo

    FROM Account A
    INNER JOIN Plate P ON A.AccountId = P.AccountId
    WHERE A.RegDate > '2017-01-01'
    GROUP BY A.AccountNumber
    HAVING Count(P.LicPlateNo) > 1
    ORDER BY A.AccountNumber

Answer 2

您幾乎了解了..需要使用group by並having條件

SELECT A.AccountNumber
      ,A.AccountId
      ,P.LicPlateNo

FROM Account A
INNER JOIN (
SELECT LicPlateNo, AccountId
FROM Plate 
GROUP BY AccountId
HAVING Count(LicPlateNo) > 1 ) P
ON A.AccountId = P.AccountId
WHERE A.RegDate > '2017-01-01'
ORDER BY A.AccountNumber

Answer 3

使用count() over()

SELECT AccountNumber
      ,AccountId
      ,LicPlateNo
FROM (
    SELECT A.AccountNumber
          ,A.AccountId
          ,P.LicPlateNo
          ,cnt = count(P.LicPlateNo) over(partition by P.AccountId)
    FROM Account A
    INNER JOIN Plate P ON A.AccountId = P.AccountId
    WHERE A.RegDate > '2017-01-01'
) t
WHERE cnt > 1
ORDER BY AccountNumber