You can use grids to display:
You can include different types of information in a grid portlet, you can include images, progress bars, time scaled values that show changes over time, aggregated fields that combine data, and Gantt charts.
Design Tip
If a list portlet contains too many columns, filters, and aggregated fields, the dynamic query that searches for and displays data for your page might become overwhelmed by the amount of data for which it is asked to search. This occurs when there are too many columns or too many aggregate functions for the query to manage in the database block to which it is allotted. A generic system error can occur during the query. If this occurs, remove some columns or aggregate functions from the portlet layout.
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