Structure Query Language (SQL) command used for data retrieval and the most common usage used is the SELECT statement. A lot of papers presenting valuable information for SQL commands writing, tuning, usage, and optimization but comparatively little effort has been spent systematically focusing on the hidden internal processes of the SELECT statement and based on the axiom a better understanding of how things work, better results can be obtained, so this paper purposes the repost Internal Hidden Processing Modeling (IHPM) that decomposes the internal processing read more..