Abraham Silberschatz researches database management systems, operating systems and distributed computing, and coauthored the database text and teaching materials with Henry F. Korth and S. Sudarshan. His Yale profile identifies these research and teaching contributions.[ref]
https://engineering.yale.edu/research-and-faculty/faculty-directory/abraham-silberschatz. Research interests and textbook authorship
Their relational model slides make the distinction between a mathematical query expression and a safely evaluable database query explicit. For example, asking for all values not appearing in a finite table can range over an unlimited universe unless the query restricts its results appropriately. Restricting candidate values to those occurring in stored data makes the intended finite computation visible. This is one reason database theory specifies a query's semantics rather than relying on suggestive notation alone.[ref]
Relational Model slides for Database System Concepts by Abraham Silberschatz and others. slides 3.82 and 3.86, Safety of Expressions
Portrait of Abraham Silberschatz
. Source. Articles by others on the same topic
Abraham Silberschatz is a prominent computer scientist known for his contributions to database systems, operating systems, and information systems. He is a professor at the University of Texas at Austin and has authored or co-authored several influential textbooks and papers in the field of computer science. One of his most well-known works is the textbook "Database System Concepts," co-authored with Henry Korth and S. Sudarshan, which is widely used in academia for teaching database management systems.