SAP获利能力报表常用Tcode的区别（报表：Report；表单：Form）
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KE30：执行报表，COPA的常用报表（实际数据和计划数据），即：实际数据报表和计划数据报表可在KE30中显示。
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KE91和KE31的区别：KE91是用来创建基于行项目的COPA报表（数据取自行项目表CE1XXXX和获利段表CE4XXXX，其中：XXXX为经营范围代码）；KE31是用来创建获利能力段的报表（该类报表的特性只能取KEQ3/KEQ4中的可用的获利能力特性，若KEQ3中将某特性设置为不可用，则KE31中无法取到该特性的信息），其数据取自获利段级别的数据表CE3XXXX和获利段数据表CE4XXXX。KE94与KE34的区别与此相同。
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KE24与KE25的区别：KE24是取获利能力表的实际数据行项目，而KE25是取获利能力表的计划数据行项目。
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KE30/KE24/KE25等COPA标准的报表，无法使用排除某个值来进行报表查询的，这主要是考虑到系统运行性能问题（即便排除了某个值，系统输出的报表也会将排除的值显示出来）。如果需要排除某值的查询，只能使用SE16/SE16N对COPA的数据表CE1XXXX-CE4XXXX进行查询.具体参阅SAP Note：1767970 - 'Exclude from Selection' functionality in CO-PA reporting not available
英文解释如下：
KE31 gets the data from tables CE3XXXX andCE4XXXX (XXXX is your operating concern).
KE91 gets the data from tables CE1XXXX andCE4XXXX
KE31 gets you data at segment levelreporting and KE91 gets you data at line item level.
Sources for' 'KE31' are the characteristicsdefined as profitability segment characteristics in transaction KEQ3.
Sources for 'KE91' are all characteristicsthat you have in table CE1XXXX (where XXXX is your operating concern. It mightbe possible you don't have some technical characteristic but it is the concernand you should be able to use almost all characteristics of CE1XXXX.
Go through this link which will give you anoverview on the table structure: http://help.sap.com/saphelp_46c/helpdata/en/74/e3a226e64e11d1a5300060087a7a87/content.htm
COPA中常用的CE1XXXX/ CE2XXXX/CE3XXXX/ CE4XXXX的解释如下：
CE1****: Table CE1**** stores actual line item data. This table stores allvalues—characteristic values, value field values, and the profitability segmentfor all actual posting in CO-PA. As with the actual line items table, allcharacteristics, including technical T-type characteristics, are included andposted to in CE1****. You can create drill-down reports from the line itemtables. You can display line items in CO-PA, but it is a veryperformance-exhaustive and lengthy process. You should access line items onlywhen you absolutely need to view characteristics that are not part of thesegment level.
CE2****: Table CE2**** stores plan line item data. This table stores allvalues—characteristic values, value field values, and profitability segment forall plan posting in CO-PA. All characteristic, including technical T-typecharacteristics, are included and posted to in CE2****.
CE3****: Table CE3**** stores data in its first summarized form. Where tableCE4**** stores only combinations of characteristics and creates a profitabilitysegment number. CE3**** stores the values of value fields along with theprofitability segment number. CE3**** does not store any actual characteristicvalues (there are no characteristic fields in the database structure ofCE3****), only the profitability segment number. CE3**** is also utilized bydrill-down reporting to enhance performance.
CE4****: Table CE4**** is the profitability segment level table. CE4SINO storeseach possible combination of characteristic values (as they are posted) andassigns each combination a profitability segment number. Profitability segmentnumbers greatly enhance performance on drill-down reporting. CE4**** comes witha standard index and a secondary index. SAP will determine which index providesthe best performance.
也可以参考SAP Library:http://help.sap.com/saphelp_46c/helpdata/en/74/e3a226e64e11d1a5300060087a7a87/content.htm
CE4****_ACCT与BSEG的关系（CE4****_ACCT的具体解释参阅SAPNote:199467）：
BSEG-PAOBJNR = CE4****_ACCT-PAOBJNR
CE4****_ACCT-CE4KEY = CE4****-PAOBJNR
CE4****-PAOBJNR = CE1****-PAOBJNR