What is the difference between
My goal is to search only a number of specific lists by their list GUID. The specific lists I need are both Generic List and Libraries.
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The difference in the two is how they retrieve the desired data.
SPSiteDataQuery executes a CAML Query towards the SharePoint Site Collection.
Think of how you would use CAML Query to gather
SPListItems from an
SPList and scale it to a
KeywordQuery utilizes the SharePoint Search Service engine to retrieve data from the Indexed results.
KeywordQuery is often recommended in most cases because it is faster to retrieve already indexed items.