SQL返回與相應的MAX（）值有關的數據

Question

我有一個SQL查詢問題。 我的數據庫如下所示：

State   | City         | Population
-----------------------------------
Texas   | Austin       | 865.00
Texas   | Houston      | 2.200.00
Florida | Jacksonville | 840.000
Florida | Miami        | 417.000
...     | ...          | ...

現在，我想知道一個州和相關城市的最大人口，如下所示：

OUTPUT:
 State   | City         | Population
 -----------------------------------
 Texas   | Houston      | 2.200.00
 Florida | Jacksonville | 840.000
 ...     | ...          | ...

我怎樣才能做到這一點？

編輯：我使用MSAcces 2013，表名稱：TPopulation。 對困惑感到抱歉。

Answer 1

盡管這里不太可能建立聯系，但這種方法可以實現聯系。

-- overall
select t1.State, t1.City, t1.Population
from T as t1
where Population = (
    select max(t2.Population) from T as t2
)

-- per state
select t1.State, t1.City, t1.Population
from T as t1
where t1.Population = (
    select max(t2.Population) from T as t2 where t2.State = t1.State
)

Answer 2

請注意，如果每個州不止一個城市的最大人口數相同，則每個州將返回多個城市。

MS訪問：

SELECT 
  T1.State,
  T1.City,
  T1.Population
FROM
  TPopulation AS T1
WHERE
  T1.Population =
    (SELECT MAX(T2.Population) FROM TPopulation AS T2 WHERE T2.State = T1.State)

ANSI：

SELECT
    MaxP.State,
    S.City,
    S.Population
FROM
    (
    SELECT
        State,
        MAX(Population)
    FROM
        TPopulation
    GROUP BY
        State
    ) AS MaxP
    INNER JOIN TPopulation AS S ON
        S.State = MaxP.State
        AND S.Population = MaxP.Population
ORDER BY
    MaxP.State ASC,
    S.City ASC

Answer 3

這是我的代碼。 它顯示了正確的順序，最大的城市在每個州中排名第一。 但這顯示了每個州的每個城市，而我只想要每個州最大的城市：

SELECT State, City, Population
FROM TPopulation
ORDER BY State DESC , Population DESC;

OUTPUT:
State   | City         | Population
-----------------------------------
Texas   | Houston      | 2.200.00
Texas   | Austin       | 865.00
Florida | Jacksonville | 840.000
Florida | Miami        | 417.000
...     | ...          | ...