Question

我的公司认为我们会提供一些报告。我遇到了一个问题，即使用该报告的管理人员暂停了。经过一些调查后，我发现从存储过程中返回93,000条记录需要5分钟，并且从视图中返回68,000条记录执行select语句并添加1 where子句（年份规范）。

在启动执行计划的情况下运行select后，我通过添加缺少的索引在68,000条记录上从3分钟到16秒。对我来说仍然太慢了，因为这不应该超过一秒或2。

执行计划在我的聚集索引扫描中有84％的成本。在这里找到另一个问题，询问他们如何减少并尝试解决方案，但它对我没有任何影响。我不是DBA，而是asp.net开发人员，所以我不知道索引和优化的细节。

查询未执行select *，因为其他人建议不要执行以下操作：

SELECT 
    [Customer_Type]
    ,[Customer]
    ,[Unit_Number]
    ,[Cert_Number]
    ,[Effective_Date]
    ,[Expiration_Date]
    ,[Coverage]
    ,[CoveragePercentThefts]
    ,[Amount]
    ,[Facility_Name]
    ,[Facility_Policy_Number]
    ,[Accounting_Period]
    ,[Entry_Date]
    ,[Entry_Month]
    ,[Entry_Year]
    ,[FTD]
    ,[Month_FTD]
    ,[Year_FTD]
    ,[Entry_By]
    ,[Net_payment]
    ,[transaction_code]
    ,[Facility_Address]
    ,[Facility_City]
    ,[Facility_State]
    ,[Full_Name]
    ,[CalculatedNet]
    ,[PctTenantsInsured]
FROM 
    [Policy_Tracking].[dbo].[vw_Facility_Detail_Report_V4]
WHERE
    Year_FTD = '2016'

有人会介意帮我把这个改成更好的数字吗？我很感激帮助。

修改

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE VIEW [dbo].[vw_Facility_Detail_Report_V4]
AS
    SELECT        
        dbo.Customer_Types.Customer_Type, 
        CASE 
           WHEN Customer_Types.Customer_Type = 'I' 
              THEN CUSTOMERS.First_Name + ' ' +     CUSTOMERS.Last_Name 
           WHEN Customer_Types.Customer_Type = 'O' 
                AND CUSTOMERS.Organization_Name > '' 
              THEN CUSTOMERS.Organization_Name 
           ELSE CUSTOMERS.First_Name + ' ' + CUSTOMERS.Last_Name 
        END AS Customer, 
        dbo.POLICYS.Unit_Number, dbo.POLICYS.Cert_Number, 
        dbo.POLICYS.Effective_Date, dbo.POLICYS.Expiration_Date, 
        dbo.Coverages.Coverage, dbo.CoveragePercentThefts.Description AS CoveragePercentThefts, 
        dbo.PAYMENTS_Transactions.Amount, dbo.FACILITYS.Facility_Name, 
        dbo.FACILITYS.Facility_Policy_Number, 
        dbo.PAYMENTS_Transactions.Accounting_Period, 
        dbo.PAYMENTS_Transactions.Mod_Date AS Entry_Date, 
        MONTH(dbo.PAYMENTS_Transactions.Mod_Date) AS Entry_Month, 
        YEAR(dbo.PAYMENTS_Transactions.Mod_Date) AS Entry_Year, 
        dbo.PAYMENTS_Transactions.Transaction_Date AS FTD, 
        MONTH(dbo.PAYMENTS_Transactions.Transaction_Date) AS Month_FTD, 
        YEAR(dbo.PAYMENTS_Transactions.Transaction_Date) AS Year_FTD, 
        dbo.PAYMENTS_Transactions.Mod_ID AS Entry_By, 
        dbo.siteLink_Statement.dcNetPayment AS Net_payment, 
        dbo.PAYMENTS_Transactions.Payment_Tran_Code_ID AS transaction_code, 
        dbo.FACILITYS.Address AS Facility_Address, 
        dbo.FACILITYS.City AS Facility_City, dbo.FACILITYS.State AS Facility_State, 
        dbo.CUSTOMERS.Full_Name, 
        dbo.PAYMENTS_Transactions.Amount - dbo.FACILITYS.Commission_Rate * .01 * dbo.PAYMENTS_Transactions.Amount AS CalculatedNet, 
        dbo.siteLink_Statement.dcPctTenantsInsured AS PctTenantsInsured
    FROM            
        dbo.Customer_Types 
    RIGHT OUTER JOIN
        dbo.CUSTOMERS ON dbo.Customer_Types.ID = dbo.CUSTOMERS.Customer_Type_ID 
    RIGHT OUTER JOIN
        dbo.Policy_Facility_Customer 
    INNER JOIN
        dbo.POLICYS ON dbo.Policy_Facility_Customer.Cert_Number = dbo.POLICYS.Cert_Number 
    INNER JOIN
        dbo.FACILITYS ON dbo.POLICYS.Facility_Policy_Number = dbo.FACILITYS.Facility_Policy_Number 
                      AND dbo.Policy_Facility_Customer.Facility_ID = dbo.FACILITYS.ID 
    LEFT OUTER JOIN
        dbo.Coverages ON dbo.POLICYS.Coverage_ID = dbo.Coverages.ID 
    LEFT OUTER JOIN
        dbo.CoveragePercentThefts ON dbo.POLICYS.Coverage_Percent_Theft_ID = dbo.CoveragePercentThefts.ID 
        ON dbo.CUSTOMERS.ID = dbo.Policy_Facility_Customer.Customer_ID 
    RIGHT OUTER JOIN
        dbo.PAYMENTS_Transactions ON dbo.POLICYS.Cert_Number = dbo.PAYMENTS_Transactions.Cert_Number 
    LEFT OUTER JOIN
        dbo.siteLink_Statement ON dbo.FACILITYS.Facility_Policy_Number = dbo.siteLink_Statement.SSFNumber 
                               AND MONTH(dbo.PAYMENTS_Transactions.Accounting_Period) = MONTH(DATEADD(m, - 1, dbo.siteLink_Statement.zCreationDate)) 
                               AND YEAR(dbo.PAYMENTS_Transactions.Accounting_Period) = YEAR(DATEADD(m, - 1, dbo.siteLink_Statement.zCreationDate))
GO

EXEC sys.sp_addextendedproperty @name=N'MS_DiagramPane1', @value=N'[0E232FF0-B466-11cf-A24F-00AA00A3EFFF, 1.00]
Begin DesignProperties = 
   Begin PaneConfigurations = 
      Begin PaneConfiguration = 0
     NumPanes = 4
     Configuration = "(H (1[40] 4[20] 2[20] 3) )"
  End
  Begin PaneConfiguration = 1
     NumPanes = 3
     Configuration = "(H (1[34] 4[49] 3) )"
  End
  Begin PaneConfiguration = 2
     NumPanes = 3
     Configuration = "(H (1[50] 2[25] 3) )"
  End
  Begin PaneConfiguration = 3
     NumPanes = 3
     Configuration = "(H (4 [30] 2 [40] 3))"
  End
  Begin PaneConfiguration = 4
     NumPanes = 2
     Configuration = "(H (1[56] 3) )"
  End
  Begin PaneConfiguration = 5
     NumPanes = 2
     Configuration = "(H (2 [66] 3))"
  End
  Begin PaneConfiguration = 6
     NumPanes = 2
     Configuration = "(H (4 [50] 3))"
  End
  Begin PaneConfiguration = 7
     NumPanes = 1
     Configuration = "(V (3))"
  End
  Begin PaneConfiguration = 8
     NumPanes = 3
     Configuration = "(H (1[15] 4[76] 2) )"
  End
  Begin PaneConfiguration = 9
     NumPanes = 2
     Configuration = "(H (1[28] 4) )"
  End
  Begin PaneConfiguration = 10
     NumPanes = 2
     Configuration = "(H (1[66] 2) )"
  End
  Begin PaneConfiguration = 11
     NumPanes = 2
     Configuration = "(H (4 [60] 2))"
  End
  Begin PaneConfiguration = 12
     NumPanes = 1
     Configuration = "(H (1) )"
  End
  Begin PaneConfiguration = 13
     NumPanes = 1
     Configuration = "(V (4))"
  End
  Begin PaneConfiguration = 14
     NumPanes = 1
     Configuration = "(V (2))"
  End
  ActivePaneConfig = 0
   End
   Begin DiagramPane = 
  Begin Origin = 
     Top = -100
     Left = 0
  End
  Begin Tables = 
     Begin Table = "Customer_Types"
        Begin Extent = 
           Top = 20
           Left = 680
           Bottom = 128
           Right = 836
        End
        DisplayFlags = 280
        TopColumn = 0
     End
     Begin Table = "CUSTOMERS"
        Begin Extent = 
           Top = 20
           Left = 446
           Bottom = 128
           Right = 620
        End
        DisplayFlags = 280
        TopColumn = 6
     End
     Begin Table = "Policy_Facility_Customer"
        Begin Extent = 
           Top = 22
           Left = 40
           Bottom = 130
           Right = 191
        End
        DisplayFlags = 280
        TopColumn = 0
     End
     Begin Table = "POLICYS"
        Begin Extent = 
           Top = 38
           Left = 387
           Bottom = 146
           Right = 606
        End
        DisplayFlags = 280
        TopColumn = 0
     End
     Begin Table = "FACILITYS"
        Begin Extent = 
           Top = 188
           Left = 164
           Bottom = 296
           Right = 353
        End
        DisplayFlags = 280
        TopColumn = 0
     End
     Begin Table = "Coverages"
        Begin Extent = 
           Top = 155
           Left = 639
           Bottom = 263
           Right = 790
        End
        DisplayFlags = 280
        TopColumn = 0
     End
     Begin Table = "CoveragePercentThefts"
        Begin Extent = 
           Top = 330
           Left = 38
           Bottom = 438
           Right = 240
  ' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'VIEW',@level1name=N'vw_Facility_Detail_Report_V4'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_DiagramPane2', @value=N'          End
        DisplayFlags = 280
        TopColumn = 0
     End
     Begin Table = "PAYMENTS_Transactions"
        Begin Extent = 
           Top = 432
           Left = 484
           Bottom = 540
           Right = 682
        End
        DisplayFlags = 280
        TopColumn = 0
     End
     Begin Table = "siteLink_Statement"
        Begin Extent = 
           Top = 240
           Left = 1076
           Bottom = 369
           Right = 1276
        End
        DisplayFlags = 280
        TopColumn = 0
     End
  End
   End
   Begin SQLPane = 
   End
   Begin DataPane = 
      Begin ParameterDefaults = ""
      End
      Begin ColumnWidths = 20
     Width = 284
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
     Width = 1500
  End
   End
   Begin CriteriaPane = 
      Begin ColumnWidths = 11
     Column = 19890
     Alias = 1410
     Table = 1500
     Output = 720
     Append = 1400
     NewValue = 1170
     SortType = 1350
     SortOrder = 1410
     GroupBy = 1350
     Filter = 1350
     Or = 1350
     Or = 1350
     Or = 1350
  End
   End
End
' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'VIEW',@level1name=N'vw_Facility_Detail_Report_V4'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_DiagramPaneCount', @value=2 , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'VIEW',@level1name=N'vw_Facility_Detail_Report_V4'
GO

Answer 1

如果您可以重构此视图，那将是最佳解决方案。如果没有，你几乎没有选择。

What makes a SQL statement sargable?

您的这部分查询不是sargable

LEFT OUTER JOIN
dbo.siteLink_Statement ON dbo.FACILITYS.Facility_Policy_Number = dbo.siteLink_Statement.SSFNumber 
   AND MONTH(dbo.PAYMENTS_Transactions.Accounting_Period) = MONTH(DATEADD(m, - 1, dbo.siteLink_Statement.zCreationDate)) 
   AND    YEAR(dbo.PAYMENTS_Transactions.Accounting_Period) = YEAR(DATEADD(m, - 1, dbo.siteLink_Statement.zCreationDate))

确保所有JOINs Column都应编入索引。
如果可能，那么您可以将所选列包括为覆盖索引以避免密钥查找。 https://www.simple-talk.com/sql/learn-sql-server/using-covering-indexes-to-improve-query-performance/

查看查询

1 个答案: