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c# - 选择第 7 个人（行）并得到 7 作为结果

问题描述

我想选择第 7 个人（Pierre Gasly（例如））Score list Season F1，所以我可以在我的 C# 应用程序中返回数字 7。

SELECT CONCAT(strVoorNaam, strTussenVoegsel, ' ',  strAchterNaam) AS Naam, SUM(CAST(tblPunten.strScore AS INT)) AS score
FROM tblPunten
JOIN tblPuntenCoureur ON tblPuntenCoureur.PuntenID = tblPunten.ID
JOIN tblPersoon ON tblPersoon.ID = tblPuntenCoureur.PersoonID
JOIN tblSeizoen ON tblSeizoen.ID = tblPuntenCoureur.SeizoenID
WHERE tblPunten.ID != 12 AND tblPunten.ID != 13 AND  tblPunten.ID != 14 AND  tblPunten.ID != 15
AND  tblPunten.ID != 16 AND  tblPunten.ID != 17 AND  tblPunten.ID != 18 AND  tblPunten.ID != 19 AND tblSeizoen.intJaartal = 2019 
GROUP BY CONCAT(strVoorNaam, strTussenVoegsel, ' ',  strAchterNaam), tblPersoon.strAchterNaam
ORDER BY score DESC

标签： c#sqlsql-servertsqlsql-order-by

解决方案

使用行限制子句：

select 
    concat(strvoornaam, strtussenvoegsel, ' ',  strachternaam) as naam, 
    sum(cast(pu.strscore as int)) as score
from tblpunten pu
join tblpuntencoureur pc on pc.puntenid = pu.id
join tblpersoon pe on pe.id = pc.persoonid
join tblseizoen se on se.id = pc.seizoenid
where pu.id not between 12 and 19 and se.intjaartal = 2019 
group by strvoornaam, strtussenvoegsel, strachternaam, pe.strachternaam
order by score desc
offset 6 rows fetch next 1 row only

这为您提供了结果集中的第七行。

旁注：

  • 表别名有助于保持查询简洁且易于编写
  • 您应该对查询中起作用的所有列进行限定

另一方面，如果你想获得特定人的等级，那就不同了。您可以rank()改用：

select *
from (
    select 
        concat(strvoornaam, strtussenvoegsel, ' ',  strachternaam) as naam, 
        sum(cast(pu.strscore as int)) as score,
        rank() over(order by sum(cast(pu.strscore as int)) desc) rn
    from tblpunten pu
    join tblpuntencoureur pc on pc.puntenid = pu.id
    join tblpersoon pe on pe.id = pc.persoonid
    join tblseizoen se on se.id = pc.seizoenid
    where pu.id not between 12 and 19 and se.intjaartal = 2019 
    group by strvoornaam, strtussenvoegsel, strachternaam, pe.strachternaam
) t
where naam = 'Pierre Gasly'

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