La clarification de l'utilisation des index de couverture

Question

Comme je sais que l'index de couverture est index qui devrait inclure toutes les colonnes dans l'instruction SELECT. Si oui, si j'ai requête comme suit:

SELECT ActionDate -- Дата мероприятия 
     ,ManagerName -- ФИО менеджера 
     ,City  -- Город мероприятия 
     ,Organazer -- Юр.Лицо организатора 
     ,[Action] -- Мероприятие 
     ,Category -- Категория 
     ,EnteringProfitability -- Входящая доходность % 
     ,PlaceId 
     ,PlaceName 
     -- Выручка 
     ,SUM(isMetroCashDesk * Price) AS RevenueMetro --'Выручка:Кассы-метро' 
     ,SUM(isRestCashDesk * Price) AS RevenueRest --'Выручка:Кассы-остальные' 
     ,SUM(isPortal2CashDesk * Price) AS RevenuePortal2 --'Выручка:Портал 2.0' 
     ,SUM(isEurosetCashDesk * Price) AS RevenueEuroset --'Выручка:Евросеть' 
     ,SUM(isPartnersCashDesk * Price) AS RevenuePartners --'Выручка:Партнеры (субагенты)' 
     ,SUM(isCashDesksPlatforms * Price) AS RevenueCashDesksPlatforms --'Выручка:Кассы-площадки' 
     -- Билеты 
     ,SUM(isMetroCashDesk) AS TicketsMetro  --'Билеты:Кассы-метро' 
     ,SUM(isRestCashDesk) AS TicketsRest --'Билеты:Кассы-остальные' 
     ,SUM(isPortal2CashDesk) AS TicketsPortal2  --'Билеты:Портал 2' 
     ,SUM(isEurosetCashDesk) AS TicketsEuroset  --'Билеты:Евросеть' 
     ,SUM(isPartnersCashDesk) AS TicketsPartners --'Билеты:Партнеры (субагенты)' 
     ,SUM(isCashDesksPlatforms) AS TicketsCashDesksPlatforms --'Билеты:Кассы-площадки' 
     -- Доход 
     ,SUM(isMetroCashDesk * Income) AS IncomeMetro --'Доход:Кассы-метро' 
     ,SUM(isRestCashDesk * Income) AS IncomeRest --'Доход:Кассы-остальные' 
     ,SUM(isPortal2CashDesk * Income) AS IncomePortal2 --'Доход:Портал 2.0' 
     ,SUM(isEurosetCashDesk * Income) AS IncomeEuroset --'Доход:Евросеть' 
     ,SUM(isPartnersCashDesk * Income) AS IncomePartners --'Доход:Партнеры (субагенты)' 
     -- Итого 
     ,SUM(Price) AS RevenueTotal --'Выручка:Итого, руб' 
     ,COUNT(*) AS TicketsTotal --'Билеты:Итого, шт' 
     ,SUM(Income) AS IncomeTotal --'Доход:Итого, руб' 
     ,CASE SUM(Price) WHEN 0 THEN NULL ELSE 100.0 * SUM(Income)/SUM(Price) END AS Profitability --'Доходность:Итого,%' 
     -- Без касс-площадок и касс-устроителей 
    ,SUM(CASE isCashDesksPlatforms WHEN 0 THEN Price ELSE 0 END) AS RevenueWithoutCashDesksPlatforms --Выручка 
    ,SUM(CASE isCashDesksPlatforms WHEN 0 THEN 1 ELSE 0 END) AS TicketsWithoutCashDesksPlatforms --Билеты 
    ,SUM(CASE isCashDesksPlatforms WHEN 0 THEN Income ELSE 0 END) AS IncomeWithoutCashDesksPlatforms --Доход 
    ,CASE SUM(CASE isCashDesksPlatforms WHEN 0 THEN Price ELSE 0 END) 
     WHEN 0 THEN NULL 
     ELSE 100.0 * SUM(CASE isCashDesksPlatforms WHEN 0 THEN Income ELSE 0 END)/SUM(CASE isCashDesksPlatforms WHEN 0 THEN Price ELSE 0 END) 
     END AS ProfitabilityWithoutCashDesksPlatforms --Доходность 
FROM #Goran 
GROUP BY ActionDate 
     ,ManagerName 
     ,City 
     ,Organazer 
     ,[Action] 
     ,Category 
     ,EnteringProfitability 
     ,PlaceId 
     ,PlaceName 
ORDER BY ActionDate 
     ,ManagerName 
     ,City 
     ,Organazer 
     ,[Action] 
     ,Category 

Je pense que je ne peux pas inclure toutes les colonnes de partie SELECT dans la couverture index. Si oui, comment puis-je améliorer la performance de cette requête?

Answer 1

Essayez celui -

Index:

CREATE NONCLUSTERED INDEX [IX_Goran] ON #Goran 
(
     ActionDate 
    , ManagerName 
    , City 
    , Organazer 
    , [Action] 
    , Category 
    , EnteringProfitability 
    , PlaceName 
) 
INCLUDE (isMetroCashDesk, Price, ...) 

Requête:

SELECT 
     ActionDate 
    , ManagerName 
    , City 
    , Organazer 
    , [Action] 
    , Category 
    , EnteringProfitability 
    , PlaceName 

    , RevenueMetro = SUM(isMetroCashDesk * Price) 
    , RevenueRest = SUM(isRestCashDesk * Price) 
    , RevenuePortal2 = SUM(isPortal2CashDesk * Price) 
    , RevenueEuroset = SUM(isEurosetCashDesk * Price) 
    , RevenuePartners = SUM(isPartnersCashDesk * Price) 
    , RevenueCashDesksPlatforms = SUM(isCashDesksPlatforms * Price) 

    , TicketsMetro = SUM(isMetroCashDesk) 
    , TicketsRest = SUM(isRestCashDesk) 
    , TicketsPortal2 = SUM(isPortal2CashDesk) 
    , TicketsEuroset = SUM(isEurosetCashDesk) 
    , TicketsPartners = SUM(isPartnersCashDesk) 
    , TicketsCashDesksPlatforms = SUM(isCashDesksPlatforms) 

    , IncomeMetro = SUM(isMetroCashDesk * Income) 
    , IncomeRest = SUM(isRestCashDesk * Income) 
    , IncomePortal2 = SUM(isPortal2CashDesk * Income) 
    , IncomeEuroset = SUM(isEurosetCashDesk * Income) 
    , IncomePartners = SUM(isPartnersCashDesk * Income) 

    , RevenueTotal = SUM(Price) 
    , TicketsTotal = COUNT(1) 
    , IncomeTotal = SUM(Income) 
    , Profitability = CASE WHEN SUM(Price) != 0 THEN 100.0 * SUM(Income)/SUM(Price) END 

    , RevenueWithoutCashDesksPlatforms = ISNULL(SUM(CASE WHEN isCashDesksPlatforms = 0 THEN Price END), 0) 
    , TicketsWithoutCashDesksPlatforms = ISNULL(SUM(CASE WHEN isCashDesksPlatforms = 0 THEN 1 END), 0) 
    , IncomeWithoutCashDesksPlatforms = ISNULL(SUM(CASE WHEN isCashDesksPlatforms = 0 THEN Income END), 0) 
    , ProfitabilityWithoutCashDesksPlatforms = 
      CASE WHEN SUM(CASE WHEN isCashDesksPlatforms = 0 THEN Price ELSE 0 END) != 0 
       THEN 100.0 * SUM(CASE WHEN isCashDesksPlatforms = 0 THEN Income ELSE 0 END)/SUM(CASE WHEN isCashDesksPlatforms = 0 THEN Price ELSE 0 END) 
      END 
FROM #Goran 
GROUP BY 
     ActionDate 
    , ManagerName 
    , City 
    , Organazer 
    , [Action] 
    , Category 
    , EnteringProfitability 
    , PlaceName 
ORDER BY 
     ActionDate 
    , ManagerName 
    , City 
    , Organazer 
    , [Action] 
    , Category 

Answer 2

Le seul indice composé que vous devez créer pour faire ce travail aussi vite que possible est celui-ci:

(ActionDate, ManagerName, City, 
Organizer, [Action], Category, 
EnteringProfitability, PlaceId, PlaceName) 

Fondamentalement, il devrait inclure la liste de tous les champs mentionnés dans votre GROUP BY (votre ORDER BY est susceptible aussi utilisez cet index).