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What is a table called, if it does not have neither Cluster nor Non-cluster Index? What is it used for?

Posted By :Ghanashyam Nayak     Posted Date :December 05, 2010    Points :15   Category :VB.Net 
Unindexed table or Heap. Microsoft Press Books and Book On Line (BOL) refers it as Heap.
A heap is a table that does not have a clustered index and, therefore, the pages are not linked by
pointers. The IAM pages are the only structures that link the pages in a table together.
Unindexed tables are good for fast storing of data. Many times it is better to drop all indexes from table and than do bulk of inserts and to restore those indexes after that.

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