Расчет второй страницы результатов от объединения

Question

У меня проблема с SQLServer.

Я пытаюсь понять, как отобразить вторую страницу результатов.Первая страница результатов извлекается с помощью запроса ниже.

SELECT TOP 10 * FROM (
    SELECT c.id, c.name, c.inserteddate, c.cityname, ftblstates.name AS statename, clc.name AS catname, '' AS listingimagelogo, '' AS orgname, relocateyn, '' AS employerclassified
    FROM tblclassifieds c
    LEFT JOIN tblclassifiedscategories clc ON c.categoryid = clc.id
    LEFT JOIN ftblstates ON c.stateid = ftblstates.id
    WHERE c.expirydate != '' AND c.expirydate >= '5/17/2011'
    UNION ALL
    SELECT ce.id, ce.name, ce.inserteddate, suburb AS cityname, ftblstates.name AS statename, ce.jobtype AS catname, ce.listingimagelogo, ce.orgname, '' AS relocateyn, '1' AS employerclassified
    FROM tblclassifiedemployers ce
    LEFT JOIN ftblstates ON ce.stateid = ftblstates.id
    WHERE ce.expirydate != '' AND ce.expirydate >= '5/17/2011'
) a
ORDER BY inserteddate desc;

Является ли ответ похожим на следующий?

SELECT TOP 10 * FROM (
    SELECT c.id, c.name, c.inserteddate, c.cityname, ftblstates.name AS statename, clc.name AS catname, '' AS listingimagelogo, '' AS orgname, relocateyn, '' AS employerclassified
    FROM tblclassifieds c
    LEFT JOIN tblclassifiedscategories clc ON c.categoryid = clc.id
    LEFT JOIN ftblstates ON c.stateid = ftblstates.id
    WHERE c.expirydate != '' AND c.expirydate >= '5/17/2011'
    UNION ALL
    SELECT ce.id, ce.name, ce.inserteddate, suburb AS cityname, ftblstates.name AS statename, ce.jobtype AS catname, ce.listingimagelogo, ce.orgname, '' AS relocateyn, '1' AS employerclassified
    FROM tblclassifiedemployers ce
    LEFT JOIN ftblstates ON ce.stateid = ftblstates.id
    WHERE ce.expirydate != '' AND ce.expirydate >= '5/17/2011'
) a

WHERE NOT a.id IN (SELECT TOP 10 tblclassifieds.id ...

ORDER BY inserteddate desc;

Может ли кто-нибудь помочь мне выполнить запрос?

Answer 1

Простой способ сделать это:

declare @page int = 2
declare @take int = 10

select * from (
    SELECT *, ROW_NUMBER() OVER(ORDER BY inserteddate desc) as rowno FROM (
        SELECT c.id, c.name, c.inserteddate, c.cityname, ftblstates.name AS statename, clc.name AS catname, '' AS listingimagelogo, '' AS orgname, relocateyn, '' AS employerclassified
        FROM tblclassifieds c
        LEFT JOIN tblclassifiedscategories clc ON c.categoryid = clc.id
        LEFT JOIN ftblstates ON c.stateid = ftblstates.id
        WHERE c.expirydate != '' AND c.expirydate >= '5/17/2011'
        UNION ALL
        SELECT ce.id, ce.name, ce.inserteddate, suburb AS cityname, ftblstates.name AS statename, ce.jobtype AS catname, ce.listingimagelogo, ce.orgname, '' AS relocateyn, '1' AS employerclassified
        FROM tblclassifiedemployers ce
        LEFT JOIN ftblstates ON ce.stateid = ftblstates.id
        WHERE ce.expirydate != '' AND ce.expirydate >= '5/17/2011'
    ) a
) b
where   rowno > (@page - 1) * @take 
    AND rowno <= @page * @take
order by rowno

Я не изменил ваш внутренний запрос.

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