如何改进此查询？试图找出索引的位置

时间：2015-07-23 19:28:55

标签： sql indexing

我已经完成了改进以下查询的任务，因为它有点慢。

SELECT 9 AS FieldCount,
A.AccountName AS Field1,
U.FullName AS Field2,
A.City AS Field3,
A.State AS Field4,
A.Zip5 AS Field5,
COUNT(DISTiNCT C.Contact_ID) AS Field6,
COUNT(DISTiNCT L.Lead_ID) AS Field7,
A.Account_ID AS Field8,
A.CreateDateTime AS Field9,
ROW_NUMBER() OVER (ORDER BY A.CreateDateTime DESC) As RowNum 
FROM
dynamic_Account A
LEFT JOIN dynamic_Contact C
ON A.Account_ID = C.Account_ID
LEFT JOIN dynamic_Lead L
ON A.Account_ID = L.Account_ID,
static_List AS LS,
static_List AS LC,
static_User AS U
WHERE (A.Account_ID > 0)
AND (A.Source_ID = LS.List_ID)
AND (A.Category_ID = LC.List_ID)
AND (A.AccountSR01_ID = U.User_ID)

GROUP BY
AccountName,
LC.Title,
U.FullName,
A.City,
A.State,
A.Zip5,
A.Account_ID,
A.CreateDateTime

任何人都可以给我一个关于如何改进关节或在哪里放置索引的指针？感谢

编辑： 下面是我从sql management studio生成的表的创建脚本。 dynamic_Account：

CREATE TABLE [dbo].[dynamic_Account](
[Account_ID] [int] IDENTITY(1,1) NOT NULL,
[RecordStatus] [int] NULL,
[AttributeList] [nvarchar](max) NULL,
[CreateUser_ID] [int] NULL,
[CreateDateTime] [datetime] NULL,
[ChangeUser_ID] [int] NULL,
[ChangeDateTime] [datetime] NULL,
[ViewUser_ID] [int] NULL,
[ViewDateTime] [datetime] NULL,
[InactiveFlag] [bit] NOT NULL,
[Source_ID] [int] NULL,
[Campaign_ID] [int] NULL,
[Comments] [nvarchar](max) NULL,
[Parent_ID] [int] NULL,
[Subsidiary_ID] [int] NULL,
[IndividualFlag] [bit] NOT NULL,
[AccountType] [nvarchar](50) NULL,
[AccountStage] [nvarchar](50) NULL,
[AccountName] [nvarchar](100) NULL,
[CompanyName] [nvarchar](100) NULL,
[Address1] [nvarchar](100) NULL,
[Address2] [nvarchar](100) NULL,
[Address3] [nvarchar](100) NULL,
[Address4] [nvarchar](100) NULL,
[City] [nvarchar](100) NULL,
[State] [nvarchar](100) NULL,
[PostalCode] [nvarchar](20) NULL,
[Zip5] [nvarchar](5) NULL,
[Zip4] [nvarchar](4) NULL,
[Country] [nvarchar](50) NULL,
[DoNotMailFlag] [bit] NOT NULL,
[TerritoryList] [nvarchar](255) NULL,
[PhoneNumber] [nvarchar](30) NULL,
[DoNotCallFlag] [bit] NOT NULL,
[FaxNumber] [nvarchar](30) NULL,
[Category_ID] [int] NULL,
[OtherNameList] [nvarchar](255) NULL,
[WebSite] [nvarchar](255) NULL,
[Geolocation] [nvarchar](100) NULL,
[OverrideTerritoryFlag] [bit] NOT NULL,
[AccountSR01_ID] [int] NULL,
[AccountSR02_ID] [int] NULL,
[AccountSR03_ID] [int] NULL,
[AccountSR04_ID] [int] NULL,
[AccountSR05_ID] [int] NULL,
[AccountSR06_ID] [int] NULL,
[AccountSR07_ID] [int] NULL,
[AccountSR08_ID] [int] NULL,
[AccountSR09_ID] [int] NULL,
[AccountSR10_ID] [int] NULL,
[AccountSR11_ID] [int] NULL,
[AccountSR12_ID] [int] NULL,
[AccountSR13_ID] [int] NULL,
[AccountSR14_ID] [int] NULL,
[AccountSR15_ID] [int] NULL,
[AnnualRevenue] [nvarchar](100) NULL,
[EmployeeCount] [nvarchar](100) NULL,
[BusinessDuration] [nvarchar](100) NULL,
[Custom_01] [nvarchar](255) NULL,
[Custom_02] [nvarchar](255) NULL,
[Custom_03] [nvarchar](255) NULL,
[Custom_04] [nvarchar](255) NULL,
[Custom_05] [nvarchar](255) NULL,
[Custom_06] [nvarchar](255) NULL,
[Custom_07] [nvarchar](255) NULL,
[Custom_08] [nvarchar](255) NULL,
[Custom_09] [nvarchar](255) NULL,
[Custom_10] [nvarchar](255) NULL,
[Custom_11] [nvarchar](255) NULL,
[Custom_12] [nvarchar](255) NULL,
[Custom_13] [nvarchar](255) NULL,
[Custom_14] [nvarchar](255) NULL,
[Custom_15] [nvarchar](255) NULL,
[Custom_16] [nvarchar](255) NULL,
[Custom_17] [nvarchar](255) NULL,
[Custom_18] [nvarchar](255) NULL,
[Custom_19] [nvarchar](255) NULL,
[Custom_20] [nvarchar](255) NULL,
CONSTRAINT [PK_dynamic_Account_1] PRIMARY KEY CLUSTERED 
(
    [Account_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
)

dynamic_Contact：

CREATE TABLE [dbo].[dynamic_Contact](
[Contact_ID] [int] IDENTITY(1,1) NOT NULL,
[RecordStatus] [int] NULL,
[AttributeList] [nvarchar](max) NULL,
[CreateUser_ID] [int] NULL,
[CreateDateTime] [datetime] NULL,
[ChangeUser_ID] [int] NULL,
[ChangeDateTime] [datetime] NULL,
[ViewUser_ID] [int] NULL,
[ViewDateTime] [datetime] NULL,
[InactiveFlag] [bit] NOT NULL,
[Source_ID] [int] NULL,
[Campaign_ID] [int] NULL,
[Comments] [nvarchar](max) NULL,
[Subsidiary_ID] [int] NULL,
[Account_ID] [int] NULL,
[ContactName] [nvarchar](50) NULL,
[Salutation] [nvarchar](10) NULL,
[FirstName] [nvarchar](50) NULL,
[MiddleInitial] [nvarchar](10) NULL,
[LastName] [nvarchar](50) NULL,
[Department] [nvarchar](255) NULL,
[JobTitle] [nvarchar](255) NULL,
[RoleList] [nvarchar](255) NULL,
[DoNotMailFlag] [bit] NOT NULL,
[WorkPhoneNumber] [nvarchar](30) NULL,
[DoNotCallWorkFlag] [bit] NOT NULL,
[CellPhoneNumber] [nvarchar](30) NULL,
[DoNotCallCellFlag] [bit] NOT NULL,
[HomePhoneNumber] [nvarchar](30) NULL,
[DoNotCallHomeFlag] [bit] NOT NULL,
[EmailAddress] [nvarchar](100) NULL,
[DoNotEmailFlag] [bit] NOT NULL,
[AltEmailAddress] [nvarchar](100) NULL,
[DoNotEmailAltFlag] [bit] NOT NULL,
[ProductInterestList] [nvarchar](255) NULL,
[Custom_01] [nvarchar](255) NULL,
[Custom_02] [nvarchar](255) NULL,
[Custom_03] [nvarchar](255) NULL,
[Custom_04] [nvarchar](255) NULL,
[Custom_05] [nvarchar](255) NULL,
[Custom_06] [nvarchar](255) NULL,
[Custom_07] [nvarchar](255) NULL,
[Custom_08] [nvarchar](255) NULL,
[Custom_09] [nvarchar](255) NULL,
[Custom_10] [nvarchar](255) NULL,
[Custom_11] [nvarchar](255) NULL,
[Custom_12] [nvarchar](255) NULL,
[ProductInterestListOld] [nvarchar](255) NULL,
 CONSTRAINT [PK_dynamic_Contact] PRIMARY KEY CLUSTERED 
(
    [Contact_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
)

dynamic_Lead：

CREATE TABLE [dbo].[dynamic_Lead](
[Lead_ID] [int] IDENTITY(1,1) NOT NULL,
[RecordStatus] [int] NULL,
[AttributeList] [nvarchar](max) NULL,
[CreateUser_ID] [int] NULL,
[CreateDateTime] [datetime] NULL,
[ChangeUser_ID] [int] NULL,
[ChangeDateTime] [datetime] NULL,
[ViewUser_ID] [int] NULL,
[ViewDateTime] [datetime] NULL,
[Source_ID] [int] NULL,
[Campaign_ID] [int] NULL,
[Comments] [nvarchar](max) NULL,
[Subsidiary_ID] [int] NULL,
[Contact_ID] [int] NULL,
[Account_ID] [int] NULL,
[LeadDateTime] [datetime] NULL,
[Description] [nvarchar](255) NULL,
[Details] [nvarchar](max) NULL,
[OverrideTerritoryFlag] [bit] NULL,
[SalesRep_ID] [int] NULL,
[SalesGroup_ID] [int] NULL,
[LeadQuality_ID] [int] NULL,
[LeadStage_ID] [int] NULL,
[LeadStatus_ID] [int] NULL,
[ActivityStatus_ID] [int] NULL,
[DisqualifiedReason_ID] [int] NULL,
[ProductInterestList] [nvarchar](255) NULL,
[Score] [int] NULL,
[Custom_01] [nvarchar](255) NULL,
[Custom_02] [nvarchar](255) NULL,
[Custom_03] [nvarchar](255) NULL,
[Custom_04] [nvarchar](255) NULL,
[Custom_05] [nvarchar](255) NULL,
[Custom_06] [nvarchar](255) NULL,
[Custom_07] [nvarchar](255) NULL,
[Custom_08] [nvarchar](255) NULL,
[Custom_09] [nvarchar](255) NULL,
[Custom_10] [nvarchar](255) NULL,
[Custom_11] [nvarchar](255) NULL,
[Custom_12] [nvarchar](255) NULL,
[ProductInterestListOld] [nvarchar](255) NULL,
CONSTRAINT [PK_dynamic_Lead] PRIMARY KEY CLUSTERED 
(
    [Lead_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,     ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
)

static_List：

CREATE TABLE [dbo].[static_List](
[List_ID] [int] IDENTITY(1,1) NOT NULL,
[RecordStatus] [int] NULL,
[AttributeList] [ntext] NULL,
[CreateUser_ID] [int] NULL,
[CreateDateTime] [datetime] NULL,
[ChangeUser_ID] [int] NULL,
[ChangeDateTime] [datetime] NULL,
[InactiveFlag] [bit] NULL,
[ListName] [nvarchar](100) NULL,
[Title] [nvarchar](100) NULL,
[Parent_ID] [int] NULL,
[DisplayIndex] [int] NULL,
[DefaultFlag] [bit] NULL,
[External_ID] [nvarchar](255) NULL,
[Custom_01] [nvarchar](255) NULL,
[Custom_02] [nvarchar](255) NULL,
[Custom_03] [nvarchar](255) NULL,
[Custom_04] [nvarchar](255) NULL,
[Custom_05] [nvarchar](255) NULL,
[Custom_06] [nvarchar](255) NULL,
[Custom_07] [nvarchar](255) NULL,
[Custom_08] [nvarchar](255) NULL,
[Custom_09] [nvarchar](255) NULL,
[Custom_10] [nvarchar](255) NULL,
[Custom_11] [nvarchar](255) NULL,
[Custom_12] [nvarchar](255) NULL,
[Custom_13] [nvarchar](255) NULL,
[Custom_14] [nvarchar](255) NULL,
[Custom_15] [nvarchar](255) NULL,
[Custom_16] [nvarchar](255) NULL,
[Custom_17] [nvarchar](255) NULL,
[Custom_18] [nvarchar](255) NULL,
[Custom_19] [nvarchar](255) NULL,
[Custom_20] [nvarchar](255) NULL,
CONSTRAINT [PK_tmp_static_List] PRIMARY KEY CLUSTERED 
(
    [List_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
)

static_User：

CREATE TABLE [dbo].[static_User](
[User_ID] [int] IDENTITY(1,1) NOT NULL,
[RecordStatus] [int] NULL,
[AttributeList] [nvarchar](max) NULL,
[CreateUser_ID] [int] NULL,
[CreateDateTime] [datetime] NULL,
[ChangeUser_ID] [int] NULL,
[ChangeDateTime] [datetime] NULL,
[InactiveFlag] [bit] NOT NULL,
[Username] [nvarchar](100) NULL,
[EmailAddress] [nvarchar](150) NULL,
[LegalName] [nvarchar](100) NULL,
[FullName] [nvarchar](100) NULL,
[FirstName] [nvarchar](100) NULL,
[LastName] [nvarchar](100) NULL,
[DisplayName] [nvarchar](100) NULL,
[NickName] [nvarchar](100) NULL,
[CellPhoneNumber] [nvarchar](100) NULL,
[WorkPhoneNumber] [nvarchar](100) NULL,
[FaxNumber] [nvarchar](100) NULL,
[JobTitle] [nvarchar](100) NULL,
[Department] [nvarchar](100) NULL,
[OfficeName] [nvarchar](100) NULL,
[Address1] [nvarchar](100) NULL,
[Address2] [nvarchar](100) NULL,
[Address3] [nvarchar](100) NULL,
[City] [nvarchar](100) NULL,
[State] [nvarchar](100) NULL,
[Zip] [nvarchar](100) NULL,
[Country] [nvarchar](100) NULL,
[LastAccess] [datetime] NULL,
[Custom_01] [nvarchar](255) NULL,
[Custom_02] [nvarchar](255) NULL,
[Custom_03] [nvarchar](255) NULL,
[Custom_04] [nvarchar](255) NULL,
[Custom_05] [nvarchar](255) NULL,
[Custom_06] [nvarchar](255) NULL,
[Custom_07] [nvarchar](255) NULL,
[Custom_08] [nvarchar](255) NULL,
[Custom_09] [nvarchar](255) NULL,
[Custom_10] [nvarchar](255) NULL,
[Custom_11] [nvarchar](255) NULL,
[Custom_12] [nvarchar](255) NULL,
CONSTRAINT [PK_dbo_static_User] PRIMARY KEY CLUSTERED 
(
    [User_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON

行计数： dynamic_Account：180,000行

dynamic_Contact：310,000行

dynamic_Lead：130,000行

static_List：1300行

static_User：250行

我目前在任何桌子上都没有索引。

3 个答案:

答案 0 :(得分：0)

由于您的结果不包含static_List中的任何内容，因此从FROM子句中删除static_List并在WHERE子句中使用EXISTS或IN可能会有所帮助。此外，您应该与您加入表格的方式保持一致。最后，因为你没有显示static_List表中的任何内容，所以在你的GROUP BY子句中包含它是没有意义的。

您可以添加加速流程的索引，但如下更改查询可能会产生最大的影响：

SELECT 9 AS FieldCount,
A.AccountName AS Field1,
U.FullName AS Field2,
A.City AS Field3,
A.State AS Field4,
A.Zip5 AS Field5,
COUNT(DISTiNCT C.Contact_ID) AS Field6,
COUNT(DISTiNCT L.Lead_ID) AS Field7,
A.Account_ID AS Field8,
A.CreateDateTime AS Field9,
ROW_NUMBER() OVER (ORDER BY A.CreateDateTime DESC) As RowNum 
FROM
dynamic_Account A
LEFT JOIN dynamic_Contact C
ON A.Account_ID = C.Account_ID
LEFT JOIN dynamic_Lead L
ON A.Account_ID = L.Account_ID,
INNER JOIN static_User U ON A.AccountSR01_ID = U.User_ID
WHERE (A.Account_ID > 0)
AND EXISTS(SELECT 1 from static_List WHERE A.Category_ID = List_ID Or A.Source_ID = List_ID)
GROUP BY
AccountName,
U.FullName,
A.City,
A.State,
A.Zip5,
A.Account_ID,
A.CreateDateTime

答案 1 :(得分：0)

一般来说，您希望在以下内容中添加索引：

a）加入 b）按列排序 c）按列分组

如果您了解数据库正在执行的操作，则必须执行以下每项操作：

a）对表格进行排序以找出哪些匹配 b）需要对序列中的表进行排序以返回结果集 c）按照

对表格进行分组

索引和查询优化是一个简单的主题，但它可能包含许多复杂性。

此外，主键会自动创建UNIQUE索引（因为主键是唯一的）。因此，只要PK存在，您就不需要对此进行索引。

这应该给你一个很好的起点。

在您的情况下，我会将索引（默认类型为＆＃34; b-tree＆＃34;）添加到：

  • dynamic_contact（Account_ID）
  • dynamic_lead（Account_ID）

希望这有帮助。

答案 2 :(得分：0)

对我来说这看起来像SQL Server。

查询返回180,000行，因此它永远不会非常快。

我对表之间的关系做了一些猜测/假设。 

WITH
CTE_Contacts
AS
(
    SELECT
        dynamic_Contact.Account_ID
        ,COUNT(*) AS CountContacts
    FROM dynamic_Contact
    GROUP BY dynamic_Contact.Account_ID
)
,CTE_Leads
AS
(
    SELECT
        dynamic_Lead.Account_ID
        ,COUNT(*) AS CountLeads
    FROM dynamic_Lead
    GROUP BY dynamic_Lead.Account_ID
)
SELECT
    9 AS FieldCount
    ,A.AccountName AS Field1
    ,U.FullName AS Field2
    ,A.City AS Field3
    ,A.State AS Field4
    ,A.Zip5 AS Field5
    ,ISNULL(CTE_Contacts.CountContacts, 0) AS Field6
    ,ISNULL(CTE_Leads.CountLeads, 0) AS Field7
    ,A.Account_ID AS Field8
    ,A.CreateDateTime AS Field9
    ,ROW_NUMBER() OVER (ORDER BY A.CreateDateTime DESC) As RowNum
FROM
    dynamic_Account AS A
    INNER JOIN static_User AS U ON U.User_ID = A.AccountSR01_ID
    INNER JOIN static_List AS LS ON LS.List_ID = A.Source_ID
    INNER JOIN static_List AS LC ON LC.List_ID = A.Category_ID
    LEFT JOIN CTE_Contacts AS C ON C.Account_ID = A.Account_ID
    LEFT JOIN CTE_Leads AS L ON L.Account_ID = A.Account_ID
WHERE
    (A.Account_ID > 0)
;

Account_ID不是NULL且从{1}开始是IDENTITY，因此所有值都应为正数，因此没有明确的过滤器Account_ID > 0。加入static_List并没有多大意义，除非A.Source_ID和A.Category_ID可以包含static_List中不存在的值（例如{{}} 1}}）。

创建索引

这些非常重要（即使您不改变查询本身）：

  • NULL
  • dynamic_Contact.Account_ID

这些并不重要，但可能有用：

  • dynamic_Lead.Account_ID
  • dynamic_Account.AccountSR01_ID
  • dynamic_Account.Source_ID
  • dynamic_Account.Category_ID

创建外键

表格之间的所有关系。

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