Question

我有以下查询运行速度非常慢，感谢您的评论，以帮助我提高运行速度。我没有权限更改任何数据库。我有两个数据库，1和2.

数据库1具有呼叫者信息，包括CallMemberID（可能少于或超过14位，可能包括逗号），车辆属性（颜色，制造商，型号，状态，......）等。

我删除了逗号，然后将CallMemberID的前14位数字作为MemberId使用：left（CallMemberID_mod，14）作为＆＃39; MemberID＆＃39;
我还将车辆属性设为“车辆”。以后使用以下方法查找每个会员ID的不同车辆数量：计数（不同（b.Vehicle））为＆＃39;每个会员的车辆数量＆＃39; 数据库2包含有关投诉的成员的信息。它包括clubcode，CallMemberID和dait（它实际上是成员拨打电话的日期）。我发现每位会员的投诉数量使用：COUNT（*）as＆＃39; ComplaintsPerMemberId＆＃39;由MemberID分组我还使用以下方法找到了每个会员ID呼叫之间的平均天数：AvgCallTimes：

WITH CallTimesOrdered (num, id, calldate) AS 
(
    SELECT   ROW_NUMBER() OVER (PARTITION BY clubcode, CallMemberID ORDER BY dait DESC) AS RowNumber
            ,CallMemberID
            ,dait
    FROM    database1
)
,AvgCallTimes (id, timespan) AS 
(
    SELECT   CurrentDate.id
            ,DATEDIFF(d, CurrentDate.calldate, PriorDate.calldate)
    FROM    CallTimesOrdered CurrentDate
            INNER JOIN CallTimesOrdered PriorDate ON PriorDate.num = CurrentDate.num - 1 AND PriorDate.id = CurrentDate.id
)

SELECT   b.MemberID
        ,AVG(d.timespan) AS AverageTimeBetweenCalls
        ,COUNT(Distinct(b.Vehicle)) AS VehicleCountPerMember
        ,ISNULL(vic.ComplaintsPerMemberId, 0) AS NumberOfComplaintsPerMember
FROM    (
            SELECT   *
                    ,ISNULL(a.VehicleColor,'') + ' ' + ISNULL(a.VehicleManufactureYearDate, '') + ' ' + ISNULL(a.VehicleLicenseStateCode, '') + ' '
                        + ISNULL(a.VehicleManufactureNumber, '') +' '
                        + ISNULL(a.VehicleModelNumber, '') 
                    AS Vehicle
            FROM    (
                        SELECT   c.CallMemberID
                                ,LEFT(CallMemberID_mod, 14) AS MemberID
                                ,c.VehicleColor
                                ,c.VehicleManufactureYearDate
                                ,c.VehicleLicenseStateCode
                                ,c.VehicleManufactureNumber
                                ,c.VehicleModelNumber
                                ,ID
                        FROM    (
                                    SELECT   LTRIM(REPLACE(CallMemberID, ',', '')) AS CallMemberID_mod
                                            ,*
                                    FROM    database1 WITH (nolock)
                                ) c
                        WHERE   LEN(CallMemberID_mod) >= 14
                    ) a
        ) b
        LEFT OUTER JOIN 
        (
            SELECT   tab.MemberId
                    ,tab.ComplaintsPerMemberId
            FROM    (
                        SELECT   clubcode
                                ,MemberId
                                ,COUNT(*) AS ComplaintsPerMemberId
                        FROM    database2
                        GROUP BY MemberId
                                ,clubcode
                    ) tab
        ) vic On vic.MemberId = b.MemberId
        LEFT JOIN 
        (
            SELECT   Id
                    ,timespan
            FROM    AvgCallTimes
        ) d ON d.ID = b.CallMemberID
GROUP BY b.MemberID
        ,vic.ComplaintsPerMemberId
ORDER BY b.MemberID

Answer 1

trying to help you but cannot say how much increase the performance without running with actual data or without seeing execution plan. Declare @MemberVehicle Table ( CallMemberID Int ,MemberID Varchar(500) ,Vehicle Varchar(500) ,ID Int ) WITH CallTimesOrdered (num, id, calldate) AS ( SELECT ROW_NUMBER() OVER (PARTITION BY clubcode, CallMemberID ORDER BY dait DESC) AS RowNumber ,CallMemberID ,dait FROM database1 ) ,AvgCallTimes (id, timespan) AS ( SELECT CurrentDate.id ,DATEDIFF(d, CurrentDate.calldate, PriorDate.calldate) FROM CallTimesOrdered CurrentDate INNER JOIN CallTimesOrdered PriorDate ON PriorDate.num = CurrentDate.num - 1 AND PriorDate.id = CurrentDate.id ) Insert Into @MemberVehicle(CallMemberID,MemberID,Vehicle,ID) Select a.CallMemberID ,a.MemberID ,ISNULL(a.VehicleColor,'') + ' ' + ISNULL(a.VehicleManufactureYearDate, '') + ' ' + ISNULL(a.VehicleLicenseStateCode, '') + ' ' + ISNULL(a.VehicleManufactureNumber, '') +' ' + ISNULL(a.VehicleModelNumber, '') AS Vehicle ,a.ID From ( SELECT Distinct c.CallMemberID ,Left(LTRIM(REPLACE(CallMemberID, ',', '')), 14) AS MemberID ,c.VehicleColor ,c.VehicleManufactureYearDate ,c.VehicleLicenseStateCode ,c.VehicleManufactureNumber ,c.VehicleModelNumber ,c.ID FROM database1 As c With (Nolock) Where Len(LTRIM(REPLACE(CallMemberID, ',', ''))) >= 14 ) As a SELECT b.MemberID ,AVG(d.timespan) AS AverageTimeBetweenCalls ,Count(b.Vehicle) AS VehicleCountPerMember ,ISNULL(vic.ComplaintsPerMemberId, 0) AS NumberOfComplaintsPerMember FROM @MemberVehicle As b LEFT OUTER JOIN ( SELECT tab.MemberId ,tab.ComplaintsPerMemberId FROM ( SELECT clubcode ,MemberId ,COUNT(*) AS ComplaintsPerMemberId FROM database2 With (Nolock) GROUP BY MemberId ,clubcode ) tab ) vic On vic.MemberId = b.MemberId LEFT JOIN ( SELECT Id ,timespan FROM AvgCallTimes With (Nolock) ) d ON d.ID = b.CallMemberID GROUP BY b.MemberID ,vic.ComplaintsPerMemberId ORDER BY b.MemberID

如何让此查询更快地运行？

1 个答案: