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このクエリはもともと、ODBC を介して外部データベースにリンクされている MS Access テーブルにアクセスする VB6 プログラムからのものでした。実行には約3:30かかります。

これで、より優れたデータベース システムに移行する方法を評価するために、SQL Server 2008 Express ボックスをセットアップしました。そこで、外部サーバーへのリンク サーバーをセットアップし (DWPROD と呼びます)、クエリを変換 (iif ステートメントを case に変更) して実行すると、12 分間実行しましたが、まだ終了しません。私は SQL Server を初めて使用するので、何がそんなに時間がかかっているのかを確認するにはどうすればよいですか? これを高速化するための提案はありますか? これについてもっと学ぶことができるように、推奨されるリソースはありますか? これは、私たちが持っているものと比較して単純なクエリであるため、この問題にもう一度取り組みます。

クエリ:

SELECT [FISCAL_YEAR] AS FISCAL_YEAR, 
[Budgets].[dbo].[Departments].strdepentity AS ENTITY_CODE,
[Budgets].[dbo].[Departments].depdiv1 AS DIVISION_CODE, 
FINANCIAL_DEPTID AS DEPTID, 
FUND_CODE, 
[CLASS_FLD] AS CLASS_CODE, 
[PROJECT_ID], 
[PROGRAM_CODE], 
[ACCOUNT] AS ACCOUNT_CODE, 
CASE
    WHEN [ACCOUNT] in ('500020','520000','520220','520240') THEN 2
    WHEN LEFT([ACCOUNT],1)='5' THEN 1
    WHEN Left([ACCOUNT],1)='6' THEN 3
    WHEN Left([ACCOUNT],1)='7' THEN 4
    WHEN Left([ACCOUNT],1)='8' THEN 5
    ELSE 0
    END AS ACCT_GRP_CODE,
Sum([BUDGET_AMOUNT]) AS GL_BUD_AMT, 
Sum([ENCUMBRANCE_AMOUNT]) AS GL_ENC_AMT, 
Sum([EXPENDITURE_AMOUNT]) AS GL_EXP_AMT, 
CASE
    WHEN Left([CLASS_FLD],2)='12' THEN 0
    WHEN Left([CLASS_FLD],3)='113' THEN 3
    WHEN Left([CLASS_FLD],3)='112' THEN 14
    WHEN Left([CLASS_FLD],3)='115' THEN 10
    WHEN Left([CLASS_FLD],3)='116' THEN 13
    WHEN Left([CLASS_FLD],3)='117' THEN 12
    WHEN Left([CLASS_FLD],3)='118' THEN 11
    WHEN Left([CLASS_FLD],2)='13' THEN 2
    WHEN Left([CLASS_FLD],2)='14' THEN 3
    WHEN Left([CLASS_FLD],1)='4' THEN 4
    WHEN Left([CLASS_FLD],1)='6' THEN 6
    ELSE 9
    END AS FUND_SOURCE 

FROM [DWPROD]..[DISC].[PS_LEDGER_DETAIL] LEFT JOIN [Budgets].[dbo].[Departments] ON    FINANCIAL_DEPTID=[Budgets].[dbo].[Departments].deporg 
WHERE ((([BUDGET_PERIOD])='2010') And (([ACCOUNTING_PERIOD]) Between 1 And 12)) 


GROUP BY 
[FISCAL_YEAR],
[Budgets].[dbo].[Departments].strdepentity, [Budgets].[dbo].[Departments].depdiv1, 
[FINANCIAL_DEPTID],
FUND_CODE, 
[CLASS_FLD], 
[PROJECT_ID], 
[PROGRAM_CODE],
[ACCOUNT], 
CASE
    WHEN [ACCOUNT] in ('500020','520000','520220','520240') THEN 2
    WHEN LEFT([ACCOUNT],1)='5' THEN 1
    WHEN Left([ACCOUNT],1)='6' THEN 3
    WHEN Left([ACCOUNT],1)='7' THEN 4
    WHEN Left([ACCOUNT],1)='8' THEN 5
    ELSE 0
    END,
    CASE
    WHEN Left([CLASS_FLD],2)='12' THEN 0
    WHEN Left([CLASS_FLD],3)='113' THEN 3
    WHEN Left([CLASS_FLD],3)='112' THEN 14
    WHEN Left([CLASS_FLD],3)='115' THEN 10
    WHEN Left([CLASS_FLD],3)='116' THEN 13
    WHEN Left([CLASS_FLD],3)='117' THEN 12
    WHEN Left([CLASS_FLD],3)='118' THEN 11
    WHEN Left([CLASS_FLD],2)='13' THEN 2
    WHEN Left([CLASS_FLD],2)='14' THEN 3
    WHEN Left([CLASS_FLD],1)='4' THEN 4
    WHEN Left([CLASS_FLD],1)='6' THEN 6
    ELSE 9
    END
HAVING (((FISCAL_YEAR)=2010) 
AND ((FINANCIAL_DEPTID) Between '100' And '999') 
AND ((ACCOUNT) Between '500000' And '899999')) 
ORDER BY [FINANCIAL_DEPTID], [CLASS_FLD], [PROJECT_ID], [ACCOUNT]

私はそれが長いことを知っています。ご覧いただきありがとうございます。

4

1 に答える 1

3

私はあなたのクエリを書き直しました：

WITH ledger_detail AS (
      SELECT pld.fiscal_year,
             pld.financial_deptid AS DEPTID, 
             pld.fund_code,
             pld.class_fld AS CLASS_CODE, 
             pld.project_id,
             pld.program_code,
             CASE
               WHEN pld.account IN ('500020','520000','520220','520240') THEN 2
               WHEN LEFT(pld.account,1) = '5' THEN 1
               WHEN LEFT(pld.account,1) = '6' THEN 3
               WHEN LEFT(pld.account,1) = '7' THEN 4
               WHEN LEFT(pld.account,1) = '8' THEN 5
               ELSE 0
             END AS ACCT_GRP_CODE,
             pld.budget_amount,
             pld.encumbrance_amount,
             pld.expenditure_amount,
             pld.account AS ACCOUNT_CODE, 
             CASE
               WHEN LEFT(pld.class_fld, 2) ='12' THEN 0
               WHEN LEFT(pld.class_fld, 3)='113' THEN 3
               WHEN LEFT(pld.class_fld, 3)='112' THEN 14
               WHEN LEFT(pld.class_fld, 3)='115' THEN 10
               WHEN LEFT(pld.class_fld, 3)='116' THEN 13
               WHEN LEFT(pld.class_fld, 3)='117' THEN 12
               WHEN LEFT(pld.class_fld, 3)='118' THEN 11
               WHEN LEFT(pld.class_fld, 2)='13' THEN 2
               WHEN LEFT(pld.class_fld, 2)='14' THEN 3
               WHEN LEFT(pld.class_fld, 1)='4' THEN 4
               WHEN LEFT(pld.class_fld, 1)='6' THEN 6
               ELSE 9
             END AS FUND_SOURCE 
        FROM [DWPROD]..[DISC].[PS_LEDGER_DETAIL] pld
       WHERE pld.budget_period = '2010' 
         AND pld.accounting_period BETWEEN 1 AND 12
         AND pld.fiscal_year = 2010
         AND pld.financial_deptid BETWEEN '100' AND '999'
         AND pld.account BETWEEN '500000' AND '899999')
   SELECT x.fiscal_year,
          y.strdepentity AS ENTITY_CODE,
          y.depdiv1 AS DIVISION_CODE,
          x.deptid, 
          x.fund_code,
          x.class_code,
          x.project_id,
          x.program_code,
          x.acct_grp_code,
          SUM(x.budget_amount) AS GL_BUD_AMT, 
          SUM(x.encumbrance_amount) AS GL_ENC_AMT, 
          SUM(x.expenditure_amount) AS GL_EXP_AMT,
          x.account AS ACCOUNT_CODE, 
          x.fund_source
     FROM ledger_detail x
LEFT JOIN [Budgets].[dbo].[Departments] y ON y.deporg = x.financial_deptid    
 GROUP BY x.fiscal_year, y.strdepentity, y.depdiv1, x.deptid, x.fund_code, x.class_code, x.project_id, x.program_code, x.acct_grp_code
 ORDER BY x.financial_deptid, x.class_fld, x.project_id, x.account

[DWPROD]..[DISC].[PS_LEDGER_DETAIL]accountおよびclass_fldにインデックスがある場合でも、関数 ( LEFT) を使用すると、このクエリでは使用できなくなります。

HAVINGまた、句ではなく句にフィルター基準を含めていますWHERE。

更新: 非 CTE 相当

   SELECT x.fiscal_year,
          y.strdepentity AS ENTITY_CODE,
          y.depdiv1 AS DIVISION_CODE,
          x.deptid, 
          x.fund_code,
          x.class_code,
          x.project_id,
          x.program_code,
          x.acct_grp_code,
          SUM(x.budget_amount) AS GL_BUD_AMT, 
          SUM(x.encumbrance_amount) AS GL_ENC_AMT, 
          SUM(x.expenditure_amount) AS GL_EXP_AMT,
          x.account AS ACCOUNT_CODE, 
          x.fund_source
     FROM (SELECT pld.fiscal_year,
                  pld.financial_deptid AS DEPTID, 
                  pld.fund_code,
                  pld.class_fld AS CLASS_CODE, 
                  pld.project_id,
                  pld.program_code,
                  CASE
                    WHEN pld.account IN ('500020','520000','520220','520240') THEN 2
                    WHEN LEFT(pld.account,1) = '5' THEN 1
                    WHEN LEFT(pld.account,1) = '6' THEN 3
                    WHEN LEFT(pld.account,1) = '7' THEN 4
                    WHEN LEFT(pld.account,1) = '8' THEN 5
                    ELSE 0
                  END AS ACCT_GRP_CODE,
                  pld.budget_amount,
                  pld.encumbrance_amount,
                  pld.expenditure_amount,
                  pld.account AS ACCOUNT_CODE, 
                  CASE
                    WHEN LEFT(pld.class_fld, 2) ='12' THEN 0
                    WHEN LEFT(pld.class_fld, 3)='113' THEN 3
                    WHEN LEFT(pld.class_fld, 3)='112' THEN 14
                    WHEN LEFT(pld.class_fld, 3)='115' THEN 10
                    WHEN LEFT(pld.class_fld, 3)='116' THEN 13
                    WHEN LEFT(pld.class_fld, 3)='117' THEN 12
                    WHEN LEFT(pld.class_fld, 3)='118' THEN 11
                    WHEN LEFT(pld.class_fld, 2)='13' THEN 2
                    WHEN LEFT(pld.class_fld, 2)='14' THEN 3
                    WHEN LEFT(pld.class_fld, 1)='4' THEN 4
                    WHEN LEFT(pld.class_fld, 1)='6' THEN 6
                    ELSE 9
                  END AS FUND_SOURCE 
             FROM [DWPROD]..[DISC].[PS_LEDGER_DETAIL] pld
            WHERE pld.budget_period = '2010' 
              AND pld.accounting_period BETWEEN 1 AND 12
              AND pld.fiscal_year = 2010
              AND pld.financial_deptid BETWEEN '100' AND '999'
              AND pld.account BETWEEN '500000' AND '899999') x
LEFT JOIN [Budgets].[dbo].[Departments] y ON y.deporg = x.financial_deptid    
 GROUP BY x.fiscal_year, y.strdepentity, y.depdiv1, x.deptid, x.fund_code, x.class_code, x.project_id, x.program_code, x.acct_grp_code
 ORDER BY x.financial_deptid, x.class_fld, x.project_id, x.account
于 2010-02-04T17:15:12.040 に答える