在表的聚簇索引中包含更多列会增加将索引扫描转换为索引查找的可能性吗？我试图通过大量读取表格来提高响应能力。它有199列，目前有65k行，是否值得呢？
以下是查询：
SELECT T1.SALESID,T1.SALESNAME,T1.RESERVATION,T1.CUSTACCOUNT,T1.INVOICEACCOUNT,T1.DELIVERYDATE,T1.URL,T1.PURCHORDERFORMNUM,T1.SALESGROUP,T1.FREIGHTSLIPTYPE,T1.DOCUMENTSTATUS,T1.INTERCOMPANYORIGINALSALESID,T1.CURRENCYCODE,T1.PAYMENT,T1.CASHDISC,T1.TAXGROUP,T1.LINEDISC,T1.CUSTGROUP,T1.DISCPERCENT,T1.INTERCOMPANYORIGINALCUSTACCOUNT,T1.PRICEGROUPID,T1.MULTILINEDISC,T1.ENDDISC,T1.CUSTOMERREF,T1.LISTCODE,T1.DLVTERM,T1.DLVMODE,T1.PURCHID,T1.SALESSTATUS,T1.MARKUPGROUP,T1.SALESTYPE,T1.SALESPOOLID,T1.POSTINGPROFILE,T1.TRANSACTIONCODE,T1.INTERCOMPANYAUTOCREATEORDERS,T1.INTERCOMPANYDIRECTDELIVERY,T1.INTERCOMPANYDIRECTDELIVERYORIG,T1.SETTLEVOUCHER,T1.INTERCOMPANYALLOWINDIRECTCREATION,T1.INTERCOMPANYALLOWINDIRECTCREATIONORIG,T1.DELIVERYNAME,T1.ONETIMECUSTOMER,T1.COVSTATUS,T1.COMMISSIONGROUP,T1.PAYMENTSCHED,T1.INTERCOMPANYORIGIN,T1.EMAIL,T1.FREIGHTZONE,T1.RETURNITEMNUM,T1.CASHDISCPERCENT,T1.CONTACTPERSONID,T1.DEADLINE,T1.PROJID,T1.INVENTLOCATIONID,T1.ADDRESSREFTABLEID,T1.VATNUM,T1.PORT,T1.INCLTAX,T1.NUMBERSEQUENCEGROUP,T1.FIXEDEXCHRATE,T1.LANGUAGEID,T1.AUTOSUMMARYMODULETYPE,T1.SALESORIGINID,T1.ESTIMATE,T1.TRANSPORT,T1.PAYMMODE,T1.PAYMSPEC,T1.FIXEDDUEDATE,T1.EXPORTREASON,T1.STATPROCID,T1.INTERCOMPANYCOMPANYID,T1.INTERCOMPANYPURCHID,T1.INTERCOMPANYORDER,T1.DLVREASON,T1.QUOTATIONID,T1.RECEIPTDATEREQUESTED,T1.RECEIPTDATECONFIRMED,T1.SHIPPINGDATEREQUESTED,T1.SHIPPINGDATECONFIRMED,T1.ITEMTAGGING,T1.CASETAGGING,T1.PALLETTAGGING,T1.ADDRESSREFRECID,T1.CUSTINVOICEID,T1.INVENTSITEID,T1.DEFAULTDIMENSION,T1.CREDITCARDCUSTREFID,T1.SHIPCARRIERACCOUNT,T1.SHIPCARRIERID,T1.SHIPCARRIERFUELSURCHARGE,T1.SHIPCARRIERBLINDSHIPMENT,T1.SHIPCARRIERDELIVERYCONTACT,T1.CREDITCARDAPPROVALAMOUNT,T1.CREDITCARDAUTHORIZATION,T1.RETURNDEADLINE,T1.RETURNREPLACEMENTID,T1.RETURNSTATUS,T1.RETURNREASONCODEID,T1.CREDITCARDAUTHORIZATIONERROR,T1.SHIPCARRIERACCOUNTCODE,T1.RETURNREPLACEMENTCREATED,T1.SHIPCARRIERDLVTYPE,T1.DELIVERYDATECONTROLTYPE,T1.SHIPCARRIEREXPEDITEDSHIPMENT,T1.SHIPCARRIERRESIDENTIAL,T1.MATCHINGAGREEMENT,T1.SYSTEMENTRYSOURCE,T1.SYSTEMENTRYCHANGEPOLICY,T1.MANUALENTRYCHANGEPOLICY,T1.DELIVERYPOSTALADDRESS,T1.SHIPCARRIERPOSTALADDRESS,T1.SHIPCARRIERNAME,T1.WORKERSALESTAKER,T1.SOURCEDOCUMENTHEADER,T1.BANKDOCUMENTTYPE,T1.SALESUNITID,T1.SMMSALESAMOUNTTOTAL,T1.SMMCAMPAIGNID,T1.CASHDISCBASEDATE,T1.CASHDISCBASEDAYS,T1.PDSBATCHATTRIBAUTORES,T1.PDSCUSTREBATEGROUPID,T1.PDSREBATEPROGRAMTMAGROUP,T1.WORKERSALESRESPONSIBLE,T1.AA_INITIALCONDITION,T1.AA_MATERIAL,T1.AA_PONUMBER,T1.AA_REFERENCENUMBER,T1.AA_FINALCONDITION,T1.AA_TEMPLATEID,T1.AA_PRIME,T1.AA_CONTAINER,T1.AA_ENTEREDDATE,T1.AA_ENTEREDDATETZID,T1.AA_EXPEDITE,T1.AA_PROMISEDDATE,T1.AA_PROMISEDDATETZID,T1.AA_GROSSWEIGHT,T1.AA_ALLOY,T1.AA_ITAR,T1.AA_EAR,T1.AA_GSI,T1.AA_SOLUTIONTREAT,T1.AA_BASICFORMID,T1.AA_PLANNEDBY,T1.AA_CLASSIFICATION,T1.INVENTPACKINGMATERIALCODE,T1.AA_CSI,T1.AA_QTY,T1.AA_BILLINGADDRESS,T1.AA_PROCESSMASTER,T1.AA_BILLINGNAME,T1.AA_PACKAGING,T1.AA_HIDECERTMEASURE,T1.AA_INVOICEAPPROVED,T1.AA_PROSHIPMEMOPRINTED,T1.AA_CERTIFIEDDATE,T1.TRI_OPSTATUS,T1.MODIFIEDDATETIME,T1.MODIFIEDBY,T1.CREATEDDATETIME,T1.CREATEDBY,T1.RECVERSION,T1.PARTITION,T1.RECID,T2.PERSON,T2.RECVERSION,T2.RECID,T3.LOCATION,T3.ADDRESS,T3.VALIDFROM,T3.VALIDFROMTZID,T3.VALIDTO,T3.VALIDTOTZID,T3.COUNTRYREGIONID,T3.RECVERSION,T3.RECID,T4.ADDRESS,T4.COUNTRYREGIONID,T4.LOCATION,T4.VALIDFROM,T4.VALIDFROMTZID,T4.RECVERSION,T4.RECID,T5.LOCATION,T5.ADDRESS,T5.VALIDFROM,T5.VALIDFROMTZID,T5.RECVERSION,T5.RECID,T6.NAME,T6.RECID,T6.RECVERSION,T6.INSTANCERELATIONTYPE,T6.NAMESEQUENCE,T6.RECVERSION,T6.RECID,T7.DESCRIPTION,T7.LOCATIONID,T7.RECVERSION,T7.RECID,T8.DESCRIPTION,T8.LOCATIONID,T8.RECVERSION,T8.RECID,T1.AA_COMMENTS FROM SALESTABLE T1 LEFT OUTER JOIN HCMWORKER T2 ON ((T2.PARTITION=@P1) AND ((T1.WORKERSALESTAKER=T2.RECID) AND (T1.WORKERSALESTAKER=T2.RECID))) LEFT OUTER JOIN LOGISTICSPOSTALADDRESS T3 ON ((T3.PARTITION=@P2) AND ((T1.DELIVERYPOSTALADDRESS=T3.RECID) AND ((1=@P3 OR (T3.ISPRIVATE=@P4)) OR (T3.PRIVATEFORPARTY=@P5)))) LEFT OUTER JOIN LOGISTICSPOSTALADDRESS T4 ON ((T4.PARTITION=@P6) AND ((T1.SHIPCARRIERPOSTALADDRESS=T4.RECID) AND ((1=@P7 OR (T4.ISPRIVATE=@P8)) OR (T4.PRIVATEFORPARTY=@P9)))) LEFT OUTER JOIN LOGISTICSPOSTALADDRESS T5 ON ((T5.PARTITION=@P10) AND ((T1.AA_BILLINGADDRESS=T5.RECID) AND ((1=@P11 OR (T5.ISPRIVATE=@P12)) OR (T5.PRIVATEFORPARTY=@P13)))) LEFT OUTER JOIN DIRPARTYTABLE T6 ON ((((T6.PARTITION=@P14) AND (T6.INSTANCERELATIONTYPE IN (@P15,@P16,@P17,@P18,@P19,@P20,@P21) )) AND ((T2.PERSON=T6.RECID) AND (T2.PERSON=T6.RECID))) AND (T6.INSTANCERELATIONTYPE IN (2975) )) LEFT OUTER JOIN LOGISTICSLOCATION T7 ON ((T7.PARTITION=@P22) AND (T3.LOCATION=T7.RECID)) LEFT OUTER JOIN LOGISTICSLOCATION T8 ON ((T8.PARTITION=@P23) AND (T5.LOCATION=T8.RECID)) WHERE (((T1.PARTITION=@P24) AND (T1.DATAAREAID=@P25)) AND (( NOT ((T1.RETURNSTATUS=@P26)) AND NOT ((T1.RETURNSTATUS=@P27))) AND (((((((((((((((((((((((((T1.SALESNAME=@P28) AND (T1.SALESID=@P29)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P30)) AND (T3.VALIDFROM=@P31)) AND (T4.LOCATION IS NULL)) AND (T5.LOCATION=@P32)) AND (T5.VALIDFROM=@P33)) AND (T6.NAME IS NULL)) AND (T6.NAMESEQUENCE IS NULL)) AND (T7.LOCATIONID=@P34)) AND (T8.LOCATIONID>=@P35)) OR (((((((((((T1.SALESNAME=@P36) AND (T1.SALESID=@P37)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P38)) AND (T3.VALIDFROM=@P39)) AND (T4.LOCATION IS NULL)) AND (T5.LOCATION=@P40)) AND (T5.VALIDFROM=@P41)) AND (T6.NAME IS NULL)) AND (T6.NAMESEQUENCE IS NULL)) AND (T7.LOCATIONID>@P42))) OR ((((((((((T1.SALESNAME=@P43) AND (T1.SALESID=@P44)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P45)) AND (T3.VALIDFROM=@P46)) AND (T4.LOCATION IS NULL)) AND (T5.LOCATION=@P47)) AND (T5.VALIDFROM=@P48)) AND (T6.NAME IS NULL)) AND NOT ((T6.NAMESEQUENCE IS NULL)))) OR ((((((((((T1.SALESNAME=@P49) AND (T1.SALESID=@P50)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P51)) AND (T3.VALIDFROM=@P52)) AND (T4.LOCATION IS NULL)) AND (T5.LOCATION=@P53)) AND (T5.VALIDFROM=@P54)) AND (T6.NAME IS NULL)) AND NOT ((T6.RECID IS NULL)))) OR (((((((((T1.SALESNAME=@P55) AND (T1.SALESID=@P56)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P57)) AND (T3.VALIDFROM=@P58)) AND (T4.LOCATION IS NULL)) AND (T5.LOCATION=@P59)) AND (T5.VALIDFROM=@P60)) AND NOT ((T6.NAME IS NULL)))) OR ((((((((T1.SALESNAME=@P61) AND (T1.SALESID=@P62)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P63)) AND (T3.VALIDFROM=@P64)) AND (T4.LOCATION IS NULL)) AND (T5.LOCATION=@P65)) AND (T5.VALIDFROM>@P66))) OR (((((((T1.SALESNAME=@P67) AND (T1.SALESID=@P68)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P69)) AND (T3.VALIDFROM=@P70)) AND (T4.LOCATION IS NULL)) AND (T5.LOCATION>@P71))) OR (((((((T1.SALESNAME=@P72) AND (T1.SALESID=@P73)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P74)) AND (T3.VALIDFROM=@P75)) AND (T4.LOCATION IS NULL)) AND NOT ((T4.VALIDFROM IS NULL)))) OR ((((((T1.SALESNAME=@P76) AND (T1.SALESID=@P77)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P78)) AND (T3.VALIDFROM=@P79)) AND NOT ((T4.LOCATION IS NULL)))) OR (((((T1.SALESNAME=@P80) AND (T1.SALESID=@P81)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION=@P82)) AND (T3.VALIDFROM>@P83))) OR ((((T1.SALESNAME=@P84) AND (T1.SALESID=@P85)) AND (T2.PERSON IS NULL)) AND (T3.LOCATION>@P86))) OR (((T1.SALESNAME=@P87) AND (T1.SALESID=@P88)) AND NOT ((T2.PERSON IS NULL)))) OR ((T1.SALESNAME=@P89) AND (T1.SALESID>@P90))) OR (T1.SALESNAME>@P91)))) ORDER BY T1.SALESNAME,T1.SALESID,T2.PERSON,T3.LOCATION,T3.VALIDFROM,T4.LOCATION,T4.VALIDFROM,T5.LOCATION,T5.VALIDFROM,T6.NAME,T6.RECID,T6.NAMESEQUENCE,T7.LOCATIONID,T8.LOCATIONID OPTION(FAST 2)
答案 0 :(得分：2)
无法选择聚集索引中的列。它始终包含所有列。
如果你的意思是键列：这里没有“机会”。它取决于查询索引是否适合。没有架构和查询就没有什么可说的。请参考几乎任何索引教程来自己解答。
答案 1 :(得分：1)
是否会向聚集索引密钥（又称主键）添加更多列，可能会将索引扫描转换为索引搜索？是的，但通过主键进行查询调整可能会产生其他复杂情况。在您想要“寻找”的列上添加非聚集索引可能不那么痛苦。
您能提供问题查询吗？