group header isgroupis a basic band for rendering reports that usegroup headerCreated using bands.group headerIt is not possible to generate grouped reports without using bands.

group headerBands are output once at the beginning of each group and typically contain header information displayed as group name, date, grouping criteria, etc.

To create a group within a report,group headerband designer or bandConditionusing the propertygroupYou must specify a qualifying condition.

 note:The header band is alwaysgroup headerOutput before the band.

When rendering the report, the report generator binds the group headers to the specified databands.group headerthe band was placed on the previous pageof the dataBands called output data rows.group headerA band always belongs to a particulardataband, usually firstData ofband located undergroup headerband.

Since data rows are output using this band and these data rows are the basis for report grouping, to be able to render a grouped report,dataI need a band. In addition, it affects the order in which groups are rendered.dataYou can specify the sorting of the rows of the band.

 important:To display the report by grouping, you need to use the data band.