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Subreports should not be used in the details section because it is a separate report with a separate call to the database. Pacing it in the details section means that a new report will be started for each record in the details section of the main report. Crosstab is a calculation inside the same report and even if there will be some additional processing , it should be not so bad as the subreport. I would try the crosstab.
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Subreports should not be used in the details section because it is a separate report with a separate call to the database. Pacing it in the details section means that a new report will be started for each record in the details section of the main report. Crosstab is a calculation inside the same report and even if there will be some additional processing , it should be not so bad as the subreport. I would try the crosstab.

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Just curious... I'm assuming the &quot;crossTabs&quot; use the main report query, as were with the subreports have their own query. &nbsp;Thus the increaased I/O with the subreports?
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Just curious... I'm assuming the "crossTabs" use the main report query, as were with the subreports have their own query.  Thus the increaased I/O with the subreports?

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Yes, that is in general true.<br />
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Sometimes the subreport effect is negligible other times it is very noticeable.<br />
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mlmcc
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Yes, that is in general true.

Sometimes the subreport effect is negligible other times it is very noticeable.

mlmcc

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I need to do some summarizing in my crystal reports group footer. &nbsp; I know that you shouldn't use &quot;subreports&quot; &nbsp;in the detail or &nbsp;group footer because to &nbsp;the overhead, but are crosstabs any better? &nbsp;Would a crosstab be more efficent and less overhead in this situation?
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I need to do some summarizing in my crystal reports group footer.   I know that you shouldn't use "subreports"  in the detail or  group footer because to  the overhead, but are crosstabs any better?  Would a crosstab be more efficent and less overhead in this situation?

Crosstabs versus subreports... which are better in a group footer

Crystal Reports is a business intelligence application from SAP SE. It is used to graphically design data connections and report layouts from a wide range of data sources including Excel spreadsheets, Oracle, SQL Server databases and Access databases, BusinessObjects Enterprise business views, and local file-system information. Report designers can place fields from these sources on the report design surface, and can also deploy them in custom formulas (using either BASIC or Crystal's own syntax), which are then placed on the design surface. Crystal Reports also supports subreports, graphing, and a limited amount of GIS functionality.

Crystal Reports

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.