In SQL Server Reporting services, it is deceiving that there are two ways to get to properties on objects. Both property menus display different options, so you must examine both when you’re looking for a property. Most of the time, I right-click on an object, and choose Properties. But there are more advanced options in the dockable Properties window. You must first select the object, then go to the Properties window.
The ‘Hide Duplicates’ property is a powerful tool to make values appear only once per data set or group. Here are some examples of the various options.
In my properties dropdown, my dataset is named DataSet1. In my report the Paid Date of 4/3/12 will only appear once. When a different paid date shows up, it will also be displayed once.
In my properties dropdown, my group is named CheckNo. In my report the Paid Date of 4/3/12 will appear once per check number. (This is actually the setting I wanted for this particular project)
In my properties dropdown, my detail level is named table1_details_group. Not sure I understand why this setting exists, because it’s the same as choosing None. In my report the Paid Date of 4/3/12 will appear on every line.