Manually Refreshing an Existing Data Source In such a case, you can schedule unattended data refresh on the server. If you have published your workbook to a PowerPivot Gallery or SharePoint site that supports PowerPivot, you or the SharePoint administrator can create a schedule for automatically updating the data in the workbook. You can refresh all data, which is the default, or you can manually choose the tables and columns to refresh for individual data sources. If you choose manual refresh option, you can refresh the data in the Data Model manually at any time. You have two types of data refresh in Data Model − Manual Refresh Refer to the chapter – Recalculating DAX Formulas for details. Note that addition of data, changing data, or editing filters always triggers recalculation of DAX formulas that depend on that data source. These changes can include adding columns or tables, or changing the rows that are imported. In addition to getting updated data from an existing source, you will need to refresh data in your workbook whenever you make changes to the schema of the source data. Filtering the data to selectively load rows from a table in the data source.Updating the data in the Data Model after the source data has changed.Making changes to data sources, such as connection properties.
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