Enabling multiple selection on <af:table>

A common mistake while enabling multiple selection for a data bound table is to leave the default values for attributes(generated while creating the table in a single selection mode) selectedRowKeys and selectionListener as is. This is wrong, these parameters will override the multiple selection that user makes. So you may need to remove them.

To enable multiple select capabilities on a <af:table>,
1. Set rowSelection="multiple"
2. Remove selectedRowKeys and selectionListener attributes(if any)

This is well documented in Fusion Developer's Guide for Oracle Application Development Framework. Please see Section 23.5, "Providing Multiselect Capabilities"