30M行のSQLデータベーステーブルの更新

Question

私は以前のレコードに基づいてフィールドを更新する必要がある約30M行のMS SQLテーブルを持っています。ここでは動作しますが、それは時間の信じられないほどの量を取っているアップデートは、次のとおりです。ここで

UPDATE AccountTransaction 
SET EndingBalance = (SELECT COALESCE(SUM(b.amount), 0) 
FROM AccountTransaction AS b 
WHERE b.AccountId = AccountTransaction.AccountId 
and b.Date <= AccountTransaction.Date 
and (b.Date != AccountTransaction.Date 
    or b.CreatedDate < AccountTransaction.CreatedDate)) 
+ Amount 

がいっぱいDDLです：

CREATE TABLE [dbo].[AccountTransaction](
    [AccountTransactionId] [uniqueidentifier] NOT NULL, 
    [AccountId] [uniqueidentifier] NOT NULL, 
    [Amount] [decimal](16, 2) NOT NULL, 
    [EndingBalance] [decimal](16, 2) NOT NULL, 
    [Date] [date] NOT NULL, 
    [CreatedDate] [datetime2](3) NOT NULL, 
CONSTRAINT [PkAccountTransaction] PRIMARY KEY CLUSTERED 
(
    [AccountTransactionId] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 

GO 

CREATE NONCLUSTERED INDEX [IxAccountTransaction_AccountId_Date_CreatedDate] ON [dbo].[AccountTransaction] 
(
    [AccountId] ASC, 
    [Date] ASC, 
    [CreatedDate] ASC 
) 
INCLUDE ([AccountTransactionId], 
    [Amount], 
    [EndingBalance]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
GO 

CREATE NONCLUSTERED INDEX [IxAccountTransaction_AccountId] ON [dbo].[AccountTransaction] 
(
    [AccountId] ASC 
) 
INCLUDE ([AccountTransactionId], 
    [Amount], 
    [EndingBalance], 
    [Date], 
    [CreatedDate]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
GO 

Answer 1

以下は、はるかに優れた性能が得られるはずですし、利用することができますIxAccountTransaction_AccountId_Date_CreatedDateインデックスの...

WITH 
    cte_Runningtotal AS (
    SELECT 
     at1.EndingBalance, 
     NewEB = SUM(at1.Amount) OVER (PARTITION BY at1.AccountId ORDER BY at1.[Date] ROWS UNBOUNDED PRECEDING) 
    FROM 
     dbo.AccountTransaction at1 
    ) 
UPDATE rt SET 
    rt.EndingBalance = rt.NewEB 
FROM 
    cte_Runningtotal rt;