我正在使用实体框架并使用我的LINQ查询中的where子句过滤记录会对性能产生巨大影响，例如：
public IQueryable<CUST> GetSearchCustomerQuery(Entities ctx, SearchVM model=null)
{
var query = ctx.CUST.AsNoTracking().AsQueryable();
var strcmpy = (string)HttpContext.Current.Session[En_UserSession.CustCompanyId.ToString()];
var multiselectcmpList = strcmpy.Split(',').Select(n => Convert.ToInt32(n)).ToArray();
query = query.Where(c => multiselectcmpList.Contains(c.B_BILL_CO.Value)).AsNoTracking();
if(model.StatusIds != null)
{
var lststatus = ctx.UDEF.Where(u => u.NAME == "CUSTSTAT" && model.StatusIds.Contains(u.UNIQUE_ID)).Select(c => c.DATA).AsNoTracking();
stParameter += "Status = " + string.Join(",", lststatus) + "\r";
}
if (model.PO != null)
{
query = query.Join(ctx.HIST, cu => cu.C_ID, hist => hist.C_ID, (cu, hist) => new { customer = cu, hist = hist }).Where(hist => hist.hist.PO_NUMBER.Contains(model.PO)).Select(recset => recset.customer).AsNoTracking();
stParameter += "P.O. = " + model.PO + "\r";
}
return query;
}
问题似乎LINQ在生成的SQL中的查询比较中创建嵌套或子查询，如下所示。
exec sp_executesql N'SELECT TOP (250)
[Project1].[C_ID] AS [C_ID],
[Project1].[C_ID_ALPHA] AS [C_ID_ALPHA],
[Project1].[C_NAME] AS [C_NAME],
[Project1].[C_NAME2] AS [C_NAME2],
[Project1].[C_ADDR1] AS [C_ADDR1],
[Project1].[C_ADDRNUM1] AS [C_ADDRNUM1],
[Project1].[C_ADDR2] AS [C_ADDR2],
[Project1].[C_CITY] AS [C_CITY],
[Project1].[C_STATE] AS [C_STATE],
[Project1].[C_ZIP] AS [C_ZIP],
[Project1].[C_PHO] AS [C_PHO],
[Project1].[C_PCONT] AS [C_PCONT],
[Project1].[C_FAX] AS [C_FAX],
[Project1].[C_FCONT] AS [C_FCONT],
[Project1].[C_CSTAT] AS [C_CSTAT],
[Project1].[C_SALESREP] AS [C_SALESREP],
[Project1].[C_QUOTE] AS [C_QUOTE],
[Project1].[C_ENDDATE] AS [C_ENDDATE],
[Project1].[C_TYPE] AS [C_TYPE],
[Project1].[C_RTES] AS [C_RTES],
[Project1].[C_NRTES] AS [C_NRTES],
[Project1].[C_LOCS] AS [C_LOCS],
[Project1].[C_NLOCS] AS [C_NLOCS],
[Project1].[C_SUFFIX] AS [C_SUFFIX],
[Project1].[ISCHILD] AS [ISCHILD],
[Project1].[C_BILL_TO] AS [C_BILL_TO],
[Project1].[C_COMMENTS] AS [C_COMMENTS],
[Project1].[C_MEMO] AS [C_MEMO],
[Project1].[C_LST_PAY] AS [C_LST_PAY],
[Project1].[C_LST_DATE] AS [C_LST_DATE],
[Project1].[C_PRV_BAL] AS [C_PRV_BAL],
[Project1].[C_CUR_BAL] AS [C_CUR_BAL],
[Project1].[C_UN_BILL] AS [C_UN_BILL],
[Project1].[C_CUR_DUE] AS [C_CUR_DUE],
[Project1].[C_30D] AS [C_30D],
[Project1].[C_60D] AS [C_60D],
[Project1].[C_90D] AS [C_90D],
[Project1].[C_FIN_CHG] AS [C_FIN_CHG],
[Project1].[B_NAME] AS [B_NAME],
[Project1].[B_NAME2] AS [B_NAME2],
[Project1].[B_ADDR1] AS [B_ADDR1],
[Project1].[B_ADDR2] AS [B_ADDR2],
[Project1].[B_CITY] AS [B_CITY],
[Project1].[B_STATE] AS [B_STATE],
[Project1].[B_ZIP] AS [B_ZIP],
[Project1].[B_PHO] AS [B_PHO],
[Project1].[B_PCONT] AS [B_PCONT],
[Project1].[B_FAX] AS [B_FAX],
[Project1].[B_FCONT] AS [B_FCONT],
[Project1].[B_B_CYCLE] AS [B_B_CYCLE],
[Project1].[B_TAXABLE] AS [B_TAXABLE],
[Project1].[B_ACCTTYPE] AS [B_ACCTTYPE],
[Project1].[B_FIN_DESC] AS [B_FIN_DESC],
[Project1].[B_DELINQ] AS [B_DELINQ],
[Project1].[B_STMT_TYP] AS [B_STMT_TYP],
[Project1].[B_BILL_TYP] AS [B_BILL_TYP],
[Project1].[B_BILL_CO] AS [B_BILL_CO],
[Project1].[B_PO_NUM] AS [B_PO_NUM],
[Project1].[B_SUSPENDS] AS [B_SUSPENDS],
[Project1].[B_SUSPENDE] AS [B_SUSPENDE],
[Project1].[B_STRT_DAT] AS [B_STRT_DAT],
[Project1].[B_STOP_DAT] AS [B_STOP_DAT],
[Project1].[B_STRT_STA] AS [B_STRT_STA],
[Project1].[B_STOP_STA] AS [B_STOP_STA],
[Project1].[B_STRT_COD] AS [B_STRT_COD],
[Project1].[B_STOP_COD] AS [B_STOP_COD],
[Project1].[B_STRT_AMT] AS [B_STRT_AMT],
[Project1].[B_STOP_AMT] AS [B_STOP_AMT],
[Project1].[B_CONTRACT] AS [B_CONTRACT],
[Project1].[B_CONTAINS] AS [B_CONTAINS],
[Project1].[B_GRID] AS [B_GRID],
[Project1].[B_AREA] AS [B_AREA],
[Project1].[B_PAYBYCC] AS [B_PAYBYCC],
[Project1].[B_MTD] AS [B_MTD],
[Project1].[B_YTD] AS [B_YTD],
[Project1].[B_LMTD] AS [B_LMTD],
[Project1].[B_LYTD] AS [B_LYTD],
[Project1].[C_UNAPPLIED] AS [C_UNAPPLIED],
[Project1].[B_CONTRACT_NUM] AS [B_CONTRACT_NUM],
[Project1].[B_CONTRACT_DATE] AS [B_CONTRACT_DATE],
[Project1].[C_15D] AS [C_15D],
[Project1].[C_45D] AS [C_45D],
[Project1].[REFERRAL] AS [REFERRAL],
[Project1].[SREP1] AS [SREP1],
[Project1].[SREP2] AS [SREP2],
[Project1].[CREP1] AS [CREP1],
[Project1].[CREP2] AS [CREP2],
[Project1].[B_NAME_2ND] AS [B_NAME_2ND],
[Project1].[B_NAME_2ND2] AS [B_NAME_2ND2],
[Project1].[B_ADDR1_2ND] AS [B_ADDR1_2ND],
[Project1].[B_ADDR1_2ND2] AS [B_ADDR1_2ND2],
[Project1].[B_CITY_2ND] AS [B_CITY_2ND],
[Project1].[B_STATE_2ND] AS [B_STATE_2ND],
[Project1].[B_ZIP_2ND] AS [B_ZIP_2ND],
[Project1].[C_DEPOSIT] AS [C_DEPOSIT],
[Project1].[CREP1_NOTES] AS [CREP1_NOTES],
[Project1].[CREP2_NOTES] AS [CREP2_NOTES],
[Project1].[SREP1_NOTES] AS [SREP1_NOTES],
[Project1].[SREP2_NOTES] AS [SREP2_NOTES],
[Project1].[C_TYPE2] AS [C_TYPE2],
[Project1].[C_TYPE3] AS [C_TYPE3],
[Project1].[B_TERMS] AS [B_TERMS],
[Project1].[REFERRAL2] AS [REFERRAL2],
[Project1].[KFACTOR] AS [KFACTOR],
[Project1].[GAL_DEGREE_DAY] AS [GAL_DEGREE_DAY],
[Project1].[LCK_GAL_DEGREE_DAY] AS [LCK_GAL_DEGREE_DAY],
[Project1].[GAL_DAY] AS [GAL_DAY],
[Project1].[LCK_GAL_DAY] AS [LCK_GAL_DAY],
[Project1].[B_BILL_INFO1] AS [B_BILL_INFO1],
[Project1].[B_BILL_INFO2] AS [B_BILL_INFO2],
[Project1].[B_BILL_INFO3] AS [B_BILL_INFO3],
[Project1].[B_BILL_INFO4] AS [B_BILL_INFO4],
[Project1].[C_DELNQLVL] AS [C_DELNQLVL],
[Project1].[B_PAGE] AS [B_PAGE],
[Project1].[B_TAXAREA] AS [B_TAXAREA],
[Project1].[T_ID] AS [T_ID],
[Project1].[C_EMAIL] AS [C_EMAIL],
[Project1].[B_EMAIL] AS [B_EMAIL],
[Project1].[OUTPUT] AS [OUTPUT],
[Project1].[C_120D] AS [C_120D],
[Project1].[C_150D] AS [C_150D],
[Project1].[B_SURCHARGE] AS [B_SURCHARGE],
[Project1].[SITEFILE] AS [SITEFILE],
[Project1].[QUOTE_SHEET] AS [QUOTE_SHEET],
[Project1].[C_TYPE4] AS [C_TYPE4],
[Project1].[C_TYPE5] AS [C_TYPE5],
[Project1].[C_TYPE6] AS [C_TYPE6],
[Project1].[C_TYPE7] AS [C_TYPE7],
[Project1].[C_TYPE8] AS [C_TYPE8],
[Project1].[C_TYPE9] AS [C_TYPE9],
[Project1].[C_LOCS2] AS [C_LOCS2],
[Project1].[C_NLOCS2] AS [C_NLOCS2],
[Project1].[C_SUFFIX2] AS [C_SUFFIX2],
[Project1].[ISCHILD2] AS [ISCHILD2],
[Project1].[C_LOCS3] AS [C_LOCS3],
[Project1].[C_NLOCS3] AS [C_NLOCS3],
[Project1].[C_SUFFIX3] AS [C_SUFFIX3],
[Project1].[ISCHILD3] AS [ISCHILD3],
[Project1].[TOTAL_TONS] AS [TOTAL_TONS],
[Project1].[B_TARIFF] AS [B_TARIFF],
[Project1].[C_LE] AS [C_LE],
[Project1].[C_LSD] AS [C_LSD],
[Project1].[C_SECTION] AS [C_SECTION],
[Project1].[C_TOWNSHIP] AS [C_TOWNSHIP],
[Project1].[C_RANGE] AS [C_RANGE],
[Project1].[C_MERIDIAN] AS [C_MERIDIAN],
[Project1].[C_CURRENCY] AS [C_CURRENCY],
[Project1].[GUARANTEED_PRICE] AS [GUARANTEED_PRICE],
[Project1].[REGION] AS [REGION],
[Project1].[DISTRICT] AS [DISTRICT],
[Project1].[PROFILE_AREA] AS [PROFILE_AREA],
[Project1].[CLIENT_ID] AS [CLIENT_ID],
[Project1].[BUSINESS_UNIT] AS [BUSINESS_UNIT],
[Project1].[LOCATION_TYPE] AS [LOCATION_TYPE],
[Project1].[RANK_CLASS] AS [RANK_CLASS],
[Project1].[DIVISION] AS [DIVISION],
[Project1].[CLIENT_SHARED_PERCENTAGE] AS [CLIENT_SHARED_PERCENTAGE],
[Project1].[SURCHARGE_BENCHMARK] AS [SURCHARGE_BENCHMARK],
[Project1].[LOCATION_ID] AS [LOCATION_ID],
[Project1].[NATIONAL_ACCT] AS [NATIONAL_ACCT],
[Project1].[V_STORENO] AS [V_STORENO],
[Project1].[PARENT_C_ID] AS [PARENT_C_ID],
[Project1].[AUTHORIZEDPAYEE] AS [AUTHORIZEDPAYEE],
[Project1].[REBATEPAY] AS [REBATEPAY],
[Project1].[LastUpdated] AS [LastUpdated],
[Project1].[B_QB_PATH] AS [B_QB_PATH],
[Project1].[ContactViaPhone] AS [ContactViaPhone],
[Project1].[Tax_Exempt_ID] AS [Tax_Exempt_ID],
[Project1].[updated] AS [updated],
[Project1].[ROWID] AS [ROWID],
[Project1].[PHONETYPE] AS [PHONETYPE],
[Project1].[C_ContactViaPhone] AS [C_ContactViaPhone],
[Project1].[C_PhoneType] AS [C_PhoneType],
[Project1].[C_WEBSITE] AS [C_WEBSITE],
[Project1].[IsAddressCertified] AS [IsAddressCertified],
[Project1].[Flex_Date] AS [Flex_Date],
[Project1].[AutoEmailCustomerReceipt] AS [AutoEmailCustomerReceipt]
FROM (
SELECT [Project1].[C_ID] AS [C_ID], [Project1].[C_ID_ALPHA] AS [C_ID_ALPHA], [Project1].[C_NAME] AS [C_NAME], [Project1].[C_NAME2] AS [C_NAME2],
[Project1].[C_ADDR1] AS [C_ADDR1], [Project1].[C_ADDRNUM1] AS [C_ADDRNUM1], [Project1].[C_ADDR2] AS [C_ADDR2], [Project1].[C_CITY] AS [C_CITY],
[Project1].[C_STATE] AS [C_STATE], [Project1].[C_ZIP] AS [C_ZIP], [Project1].[C_PHO] AS [C_PHO], [Project1].[C_PCONT] AS [C_PCONT], [Project1].[C_FAX] AS
[C_FAX], [Project1].[C_FCONT] AS [C_FCONT], [Project1].[C_CSTAT] AS [C_CSTAT], [Project1].[C_SALESREP] AS [C_SALESREP], [Project1].[C_QUOTE] AS [C_QUOTE],
[Project1].[C_ENDDATE] AS [C_ENDDATE], [Project1].[C_TYPE] AS [C_TYPE], [Project1].[C_RTES] AS [C_RTES], [Project1].[C_NRTES] AS [C_NRTES], [Project1].[C_LOCS]
AS [C_LOCS], [Project1].[C_NLOCS] AS [C_NLOCS], [Project1].[C_SUFFIX] AS [C_SUFFIX], [Project1].[ISCHILD] AS [ISCHILD], [Project1].[C_BILL_TO] AS [C_BILL_TO],
[Project1].[C_COMMENTS] AS [C_COMMENTS], [Project1].[C_MEMO] AS [C_MEMO], [Project1].[C_LST_PAY] AS [C_LST_PAY], [Project1].[C_LST_DATE] AS [C_LST_DATE], [Project1].[C_PRV_BAL] AS [C_PRV_BAL], [Project1].[C_CUR_BAL] AS [C_CUR_BAL], [Project1].[C_UN_BILL] AS [C_UN_BILL], [Project1].[C_CUR_DUE] AS [C_CUR_DUE], [Project1].[C_30D] AS [C_30D], [Project1].[C_60D] AS [C_60D], [Project1].[C_90D] AS [C_90D], [Project1].[C_FIN_CHG] AS [C_FIN_CHG], [Project1].[B_NAME] AS [B_NAME], [Project1].[B_NAME2] AS [B_NAME2], [Project1].[B_ADDR1] AS [B_ADDR1], [Project1].[B_ADDR2] AS [B_ADDR2], [Project1].[B_CITY] AS [B_CITY], [Project1].[B_STATE] AS [B_STATE], [Project1].[B_ZIP] AS [B_ZIP], [Project1].[B_PHO] AS [B_PHO], [Project1].[B_PCONT] AS [B_PCONT], [Project1].[B_FAX] AS [B_FAX], [Project1].[B_FCONT] AS [B_FCONT], [Project1].[B_B_CYCLE] AS [B_B_CYCLE], [Project1].[B_TAXABLE] AS [B_TAXABLE], [Project1].[B_ACCTTYPE] AS [B_ACCTTYPE], [Project1].[B_FIN_DESC] AS [B_FIN_DESC], [Project1].[B_DELINQ] AS [B_DELINQ], [Project1].[B_STMT_TYP] AS [B_STMT_TYP], [Project1].[B_BILL_TYP] AS [B_BILL_TYP], [Project1].[B_PO_NUM] AS [B_PO_NUM], [Project1].[B_SUSPENDS] AS [B_SUSPENDS], [Project1].[B_SUSPENDE] AS [B_SUSPENDE], [Project1].[B_STRT_DAT] AS [B_STRT_DAT], [Project1].[B_STOP_DAT] AS [B_STOP_DAT], [Project1].[B_STRT_STA] AS [B_STRT_STA], [Project1].[B_STOP_STA] AS [B_STOP_STA], [Project1].[B_STRT_COD] AS [B_STRT_COD], [Project1].[B_STOP_COD] AS [B_STOP_COD], [Project1].[B_STRT_AMT] AS [B_STRT_AMT], [Project1].[B_STOP_AMT] AS [B_STOP_AMT], [Project1].[B_CONTRACT] AS [B_CONTRACT], [Project1].[B_CONTAINS] AS [B_CONTAINS], [Project1].[B_GRID] AS [B_GRID], [Project1].[B_AREA] AS [B_AREA], [Project1].[B_PAYBYCC] AS [B_PAYBYCC], [Project1].[B_MTD] AS [B_MTD], [Project1].[B_YTD] AS [B_YTD], [Project1].[B_LMTD] AS [B_LMTD], [Project1].[B_LYTD] AS [B_LYTD], [Project1].[C_UNAPPLIED] AS [C_UNAPPLIED], [Project1].[B_CONTRACT_NUM] AS [B_CONTRACT_NUM], [Project1].[B_CONTRACT_DATE] AS [B_CONTRACT_DATE], [Project1].[C_15D] AS [C_15D], [Project1].[C_45D] AS [C_45D], [Project1].[REFERRAL] AS [REFERRAL], [Project1].[SREP1] AS [SREP1], [Project1].[SREP2] AS [SREP2],
[Project1].[CREP1] AS [CREP1], [Project1].[CREP2] AS [CREP2], [Project1].[B_NAME_2ND] AS [B_NAME_2ND], [Project1].[B_NAME_2ND2] AS [B_NAME_2ND2],
[Project1].[B_ADDR1_2ND] AS [B_ADDR1_2ND], [Project1].[B_ADDR1_2ND2] AS [B_ADDR1_2ND2], [Project1].[B_CITY_2ND] AS [B_CITY_2ND], [Project1].[B_STATE_2ND] AS
[B_STATE_2ND], [Project1].[B_ZIP_2ND] AS [B_ZIP_2ND], [Project1].[C_DEPOSIT] AS [C_DEPOSIT], [Project1].[CREP1_NOTES] AS [CREP1_NOTES], [Project1].[CREP2_NOTES]
AS [CREP2_NOTES], [Project1].[SREP1_NOTES] AS [SREP1_NOTES], [Project1].[SREP2_NOTES] AS [SREP2_NOTES], [Project1].[C_TYPE2] AS [C_TYPE2], [Project1].[C_TYPE3]
AS [C_TYPE3], [Project1].[B_TERMS] AS [B_TERMS], [Project1].[REFERRAL2] AS [REFERRAL2], [Project1].[KFACTOR] AS [KFACTOR], [Project1].[GAL_DEGREE_DAY] AS
[GAL_DEGREE_DAY], [Project1].[LCK_GAL_DEGREE_DAY] AS [LCK_GAL_DEGREE_DAY], [Project1].[GAL_DAY] AS [GAL_DAY], [Project1].[LCK_GAL_DAY] AS [LCK_GAL_DAY],
[Project1].[B_BILL_INFO1] AS [B_BILL_INFO1], [Project1].[B_BILL_INFO2] AS [B_BILL_INFO2], [Project1].[B_BILL_INFO3] AS [B_BILL_INFO3], [Project1].[B_BILL_INFO4]
AS [B_BILL_INFO4], [Project1].[C_DELNQLVL] AS [C_DELNQLVL], [Project1].[B_PAGE] AS [B_PAGE], [Project1].[B_TAXAREA] AS [B_TAXAREA], [Project1].[T_ID] AS [T_ID],
[Project1].[C_EMAIL] AS [C_EMAIL], [Project1].[B_EMAIL] AS [B_EMAIL], [Project1].[OUTPUT] AS [OUTPUT], [Project1].[C_120D] AS [C_120D], [Project1].[C_150D] AS
[C_150D], [Project1].[B_SURCHARGE] AS [B_SURCHARGE], [Project1].[SITEFILE] AS [SITEFILE], [Project1].[QUOTE_SHEET] AS [QUOTE_SHEET], [Project1].[C_TYPE4] AS
[C_TYPE4], [Project1].[C_TYPE5] AS [C_TYPE5], [Project1].[C_TYPE6] AS [C_TYPE6], [Project1].[C_TYPE7] AS [C_TYPE7], [Project1].[C_TYPE8] AS [C_TYPE8],
[Project1].[C_TYPE9] AS [C_TYPE9], [Project1].[C_LOCS2] AS [C_LOCS2], [Project1].[C_NLOCS2] AS [C_NLOCS2], [Project1].[C_SUFFIX2] AS [C_SUFFIX2],
[Project1].[ISCHILD2] AS [ISCHILD2], [Project1].[C_LOCS3] AS [C_LOCS3], [Project1].[C_NLOCS3] AS [C_NLOCS3], [Project1].[C_SUFFIX3] AS [C_SUFFIX3], [Project1].[ISCHILD3] AS [ISCHILD3], [Project1].[TOTAL_TONS] AS [TOTAL_TONS], [Project1].[B_TARIFF] AS [B_TARIFF], [Project1].[C_LE] AS [C_LE], [Project1].[C_LSD] AS [C_LSD], [Project1].[C_SECTION] AS [C_SECTION], [Project1].[C_TOWNSHIP] AS [C_TOWNSHIP], [Project1].[C_RANGE] AS [C_RANGE], [Project1].[C_MERIDIAN] AS [C_MERIDIAN], [Project1].[C_CURRENCY] AS [C_CURRENCY], [Project1].[GUARANTEED_PRICE] AS [GUARANTEED_PRICE], [Project1].[REGION] AS [REGION], [Project1].[DISTRICT] AS [DISTRICT], [Project1].[PROFILE_AREA] AS [PROFILE_AREA], [Project1].[CLIENT_ID] AS [CLIENT_ID], [Project1].[BUSINESS_UNIT] AS [BUSINESS_UNIT], [Project1].[LOCATION_TYPE] AS [LOCATION_TYPE], [Project1].[RANK_CLASS] AS [RANK_CLASS], [Project1].[DIVISION] AS [DIVISION], [Project1].[CLIENT_SHARED_PERCENTAGE] AS [CLIENT_SHARED_PERCENTAGE], [Project1].[SURCHARGE_BENCHMARK] AS [SURCHARGE_BENCHMARK], [Project1].[LOCATION_ID] AS [LOCATION_ID], [Project1].[NATIONAL_ACCT] AS [NATIONAL_ACCT], [Project1].[V_STORENO] AS [V_STORENO], [Project1].[PARENT_C_ID] AS [PARENT_C_ID], [Project1].[AUTHORIZEDPAYEE] AS [AUTHORIZEDPAYEE], [Project1].[REBATEPAY] AS [REBATEPAY], [Project1].[LastUpdated] AS [LastUpdated], [Project1].[B_QB_PATH] AS [B_QB_PATH], [Project1].[ContactViaPhone] AS [ContactViaPhone], [Project1].[Tax_Exempt_ID] AS [Tax_Exempt_ID], [Project1].[updated] AS [updated], [Project1].[ROWID] AS [ROWID], [Project1].[PHONETYPE] AS [PHONETYPE], [Project1].[C_ContactViaPhone] AS [C_ContactViaPhone], [Project1].[C_PhoneType] AS [C_PhoneType], [Project1].[C_WEBSITE] AS [C_WEBSITE], [Project1].[IsAddressCertified] AS [IsAddressCertified], [Project1].[Flex_Date] AS [Flex_Date], [Project1].[AutoEmailCustomerReceipt] AS [AutoEmailCustomerReceipt], [Project1].[B_BILL_CO] AS [B_BILL_CO], row_number() OVER (ORDER BY [Project1].[C_NAME] ASC) AS [row_number]
FROM ( SELECT
[Extent1].[C_ID] AS [C_ID],
[Extent1].[C_ID_ALPHA] AS [C_ID_ALPHA],
[Extent1].[C_NAME] AS [C_NAME],
[Extent1].[C_NAME2] AS [C_NAME2],
[Extent1].[C_ADDR1] AS [C_ADDR1],
[Extent1].[C_ADDRNUM1] AS [C_ADDRNUM1],
[Extent1].[C_ADDR2] AS [C_ADDR2],
[Extent1].[C_CITY] AS [C_CITY],
[Extent1].[C_STATE] AS [C_STATE],
[Extent1].[C_ZIP] AS [C_ZIP],
[Extent1].[C_PHO] AS [C_PHO],
[Extent1].[C_PCONT] AS [C_PCONT],
[Extent1].[C_FAX] AS [C_FAX],
[Extent1].[C_FCONT] AS [C_FCONT],
[Extent1].[C_CSTAT] AS [C_CSTAT],
[Extent1].[C_SALESREP] AS [C_SALESREP],
[Extent1].[C_QUOTE] AS [C_QUOTE],
[Extent1].[C_ENDDATE] AS [C_ENDDATE],
[Extent1].[C_TYPE] AS [C_TYPE],
[Extent1].[C_RTES] AS [C_RTES],
[Extent1].[C_NRTES] AS [C_NRTES],
[Extent1].[C_LOCS] AS [C_LOCS],
[Extent1].[C_NLOCS] AS [C_NLOCS],
[Extent1].[C_SUFFIX] AS [C_SUFFIX],
[Extent1].[ISCHILD] AS [ISCHILD],
[Extent1].[C_BILL_TO] AS [C_BILL_TO],
[Extent1].[C_COMMENTS] AS [C_COMMENTS],
[Extent1].[C_MEMO] AS [C_MEMO],
[Extent1].[C_LST_PAY] AS [C_LST_PAY],
[Extent1].[C_LST_DATE] AS [C_LST_DATE],
[Extent1].[C_PRV_BAL] AS [C_PRV_BAL],
[Extent1].[C_CUR_BAL] AS [C_CUR_BAL],
[Extent1].[C_UN_BILL] AS [C_UN_BILL],
[Extent1].[C_CUR_DUE] AS [C_CUR_DUE],
[Extent1].[C_30D] AS [C_30D],
[Extent1].[C_60D] AS [C_60D],
[Extent1].[C_90D] AS [C_90D],
[Extent1].[C_FIN_CHG] AS [C_FIN_CHG],
[Extent1].[B_NAME] AS [B_NAME],
[Extent1].[B_NAME2] AS [B_NAME2],
[Extent1].[B_ADDR1] AS [B_ADDR1],
[Extent1].[B_ADDR2] AS [B_ADDR2],
[Extent1].[B_CITY] AS [B_CITY],
[Extent1].[B_STATE] AS [B_STATE],
[Extent1].[B_ZIP] AS [B_ZIP],
[Extent1].[B_PHO] AS [B_PHO],
[Extent1].[B_PCONT] AS [B_PCONT],
[Extent1].[B_FAX] AS [B_FAX],
[Extent1].[B_FCONT] AS [B_FCONT],
[Extent1].[B_B_CYCLE] AS [B_B_CYCLE],
[Extent1].[B_TAXABLE] AS [B_TAXABLE],
[Extent1].[B_ACCTTYPE] AS [B_ACCTTYPE],
[Extent1].[B_FIN_DESC] AS [B_FIN_DESC],
[Extent1].[B_DELINQ] AS [B_DELINQ],
[Extent1].[B_STMT_TYP] AS [B_STMT_TYP],
[Extent1].[B_BILL_TYP] AS [B_BILL_TYP],
[Extent1].[B_PO_NUM] AS [B_PO_NUM],
[Extent1].[B_SUSPENDS] AS [B_SUSPENDS],
[Extent1].[B_SUSPENDE] AS [B_SUSPENDE],
[Extent1].[B_STRT_DAT] AS [B_STRT_DAT],
[Extent1].[B_STOP_DAT] AS [B_STOP_DAT],
[Extent1].[B_STRT_STA] AS [B_STRT_STA],
[Extent1].[B_STOP_STA] AS [B_STOP_STA],
[Extent1].[B_STRT_COD] AS [B_STRT_COD],
[Extent1].[B_STOP_COD] AS [B_STOP_COD],
[Extent1].[B_STRT_AMT] AS [B_STRT_AMT],
[Extent1].[B_STOP_AMT] AS [B_STOP_AMT],
[Extent1].[B_CONTRACT] AS [B_CONTRACT],
[Extent1].[B_CONTAINS] AS [B_CONTAINS],
[Extent1].[B_GRID] AS [B_GRID],
[Extent1].[B_AREA] AS [B_AREA],
[Extent1].[B_PAYBYCC] AS [B_PAYBYCC],
[Extent1].[B_MTD] AS [B_MTD],
[Extent1].[B_YTD] AS [B_YTD],
[Extent1].[B_LMTD] AS [B_LMTD],
[Extent1].[B_LYTD] AS [B_LYTD],
[Extent1].[C_UNAPPLIED] AS [C_UNAPPLIED],
[Extent1].[B_CONTRACT_NUM] AS [B_CONTRACT_NUM],
[Extent1].[B_CONTRACT_DATE] AS [B_CONTRACT_DATE],
[Extent1].[C_15D] AS [C_15D],
[Extent1].[C_45D] AS [C_45D],
[Extent1].[REFERRAL] AS [REFERRAL],
[Extent1].[SREP1] AS [SREP1],
[Extent1].[SREP2] AS [SREP2],
[Extent1].[CREP1] AS [CREP1],
[Extent1].[CREP2] AS [CREP2],
[Extent1].[B_NAME_2ND] AS [B_NAME_2ND],
[Extent1].[B_NAME_2ND2] AS [B_NAME_2ND2],
[Extent1].[B_ADDR1_2ND] AS [B_ADDR1_2ND],
[Extent1].[B_ADDR1_2ND2] AS [B_ADDR1_2ND2],
[Extent1].[B_CITY_2ND] AS [B_CITY_2ND],
[Extent1].[B_STATE_2ND] AS [B_STATE_2ND],
[Extent1].[B_ZIP_2ND] AS [B_ZIP_2ND],
[Extent1].[C_DEPOSIT] AS [C_DEPOSIT],
[Extent1].[CREP1_NOTES] AS [CREP1_NOTES],
[Extent1].[CREP2_NOTES] AS [CREP2_NOTES],
[Extent1].[SREP1_NOTES] AS [SREP1_NOTES],
[Extent1].[SREP2_NOTES] AS [SREP2_NOTES],
[Extent1].[C_TYPE2] AS [C_TYPE2],
[Extent1].[C_TYPE3] AS [C_TYPE3],
[Extent1].[B_TERMS] AS [B_TERMS],
[Extent1].[REFERRAL2] AS [REFERRAL2],
[Extent1].[KFACTOR] AS [KFACTOR],
[Extent1].[GAL_DEGREE_DAY] AS [GAL_DEGREE_DAY],
[Extent1].[LCK_GAL_DEGREE_DAY] AS [LCK_GAL_DEGREE_DAY],
[Extent1].[GAL_DAY] AS [GAL_DAY],
[Extent1].[LCK_GAL_DAY] AS [LCK_GAL_DAY],
[Extent1].[B_BILL_INFO1] AS [B_BILL_INFO1],
[Extent1].[B_BILL_INFO2] AS [B_BILL_INFO2],
[Extent1].[B_BILL_INFO3] AS [B_BILL_INFO3],
[Extent1].[B_BILL_INFO4] AS [B_BILL_INFO4],
[Extent1].[C_DELNQLVL] AS [C_DELNQLVL],
[Extent1].[B_PAGE] AS [B_PAGE],
[Extent1].[B_TAXAREA] AS [B_TAXAREA],
[Extent1].[T_ID] AS [T_ID],
[Extent1].[C_EMAIL] AS [C_EMAIL],
[Extent1].[B_EMAIL] AS [B_EMAIL],
[Extent1].[OUTPUT] AS [OUTPUT],
[Extent1].[C_120D] AS [C_120D],
[Extent1].[C_150D] AS [C_150D],
[Extent1].[B_SURCHARGE] AS [B_SURCHARGE],
[Extent1].[SITEFILE] AS [SITEFILE],
[Extent1].[QUOTE_SHEET] AS [QUOTE_SHEET],
[Extent1].[C_TYPE4] AS [C_TYPE4],
[Extent1].[C_TYPE5] AS [C_TYPE5],
[Extent1].[C_TYPE6] AS [C_TYPE6],
[Extent1].[C_TYPE7] AS [C_TYPE7],
[Extent1].[C_TYPE8] AS [C_TYPE8],
[Extent1].[C_TYPE9] AS [C_TYPE9],
[Extent1].[C_LOCS2] AS [C_LOCS2],
[Extent1].[C_NLOCS2] AS [C_NLOCS2],
[Extent1].[C_SUFFIX2] AS [C_SUFFIX2],
[Extent1].[ISCHILD2] AS [ISCHILD2],
[Extent1].[C_LOCS3] AS [C_LOCS3],
[Extent1].[C_NLOCS3] AS [C_NLOCS3],
[Extent1].[C_SUFFIX3] AS [C_SUFFIX3],
[Extent1].[ISCHILD3] AS [ISCHILD3],
[Extent1].[TOTAL_TONS] AS [TOTAL_TONS],
[Extent1].[B_TARIFF] AS [B_TARIFF],
[Extent1].[C_LE] AS [C_LE],
[Extent1].[C_LSD] AS [C_LSD],
[Extent1].[C_SECTION] AS [C_SECTION],
[Extent1].[C_TOWNSHIP] AS [C_TOWNSHIP],
[Extent1].[C_RANGE] AS [C_RANGE],
[Extent1].[C_MERIDIAN] AS [C_MERIDIAN],
[Extent1].[C_CURRENCY] AS [C_CURRENCY],
[Extent1].[GUARANTEED_PRICE] AS [GUARANTEED_PRICE],
[Extent1].[REGION] AS [REGION],
[Extent1].[DISTRICT] AS [DISTRICT],
[Extent1].[PROFILE_AREA] AS [PROFILE_AREA],
[Extent1].[CLIENT_ID] AS [CLIENT_ID],
[Extent1].[BUSINESS_UNIT] AS [BUSINESS_UNIT],
[Extent1].[LOCATION_TYPE] AS [LOCATION_TYPE],
[Extent1].[RANK_CLASS] AS [RANK_CLASS],
[Extent1].[DIVISION] AS [DIVISION],
[Extent1].[CLIENT_SHARED_PERCENTAGE] AS [CLIENT_SHARED_PERCENTAGE],
[Extent1].[SURCHARGE_BENCHMARK] AS [SURCHARGE_BENCHMARK],
[Extent1].[LOCATION_ID] AS [LOCATION_ID],
[Extent1].[NATIONAL_ACCT] AS [NATIONAL_ACCT],
[Extent1].[V_STORENO] AS [V_STORENO],
[Extent1].[PARENT_C_ID] AS [PARENT_C_ID],
[Extent1].[AUTHORIZEDPAYEE] AS [AUTHORIZEDPAYEE],
[Extent1].[REBATEPAY] AS [REBATEPAY],
[Extent1].[LastUpdated] AS [LastUpdated],
[Extent1].[B_QB_PATH] AS [B_QB_PATH],
[Extent1].[ContactViaPhone] AS [ContactViaPhone],
[Extent1].[Tax_Exempt_ID] AS [Tax_Exempt_ID],
[Extent1].[updated] AS [updated],
[Extent1].[ROWID] AS [ROWID],
[Extent1].[PHONETYPE] AS [PHONETYPE],
[Extent1].[C_ContactViaPhone] AS [C_ContactViaPhone],
[Extent1].[C_PhoneType] AS [C_PhoneType],
[Extent1].[C_WEBSITE] AS [C_WEBSITE],
[Extent1].[IsAddressCertified] AS [IsAddressCertified],
[Extent1].[Flex_Date] AS [Flex_Date],
[Extent1].[AutoEmailCustomerReceipt] AS [AutoEmailCustomerReceipt],
[Extent1].[B_BILL_CO] AS [B_BILL_CO]
FROM [dbo].[CUST] AS [Extent1]
INNER JOIN [dbo].[HIST] AS [Extent2] ON [Extent1].[C_ID] = [Extent2].[C_ID]
WHERE ([Extent1].[B_BILL_CO] IN (17, 18, 19, 20, 21, 22, 1, 23, 33, 24, 25, 26, 27, 28, 29, 30, 35, 32, 31)) AND ([Extent1].[B_BILL_CO] IS NOT NULL) AND ([Extent1].[C_CSTAT] IN (97, 644, 101, 807, 7005, 192, 8177, 531, 8178, 98, 325, 100, 8095)) AND ([Extent1].[C_CSTAT] IS NOT NULL) AND ([Extent2].[PO_NUMBER] LIKE @p__linq__0 ESCAPE N''~'')
) AS [Project1]
) AS [Project1]
WHERE [Project1].[row_number] > 0
ORDER BY [Project1].[C_NAME] ASC',N'@p__linq__0 nvarchar(4000)',@p__linq__0=N'%055%'
以上查询需要超过5分钟才能获得结果。请问，任何人都建议我如何才能提高绩效？