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I have a database that shows a few tables as HEAP, even since I am sure all of them have Clustered indexes and some even have a few Non-Clustered indexes, since a long time ago.

my understanding for HEAP table is : "A heap is a table without a clustered index"

as seen in the image, this tables have a clustered index

heap tables with clustered index

Currently using SQL Server 2014 with Compatibility mode 120

then , why are this tables being shown as heap when they have a clustered index ?

Thanks!

Peter B
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