POC(Proof of concept): Letting the company expose their product to a company and proving the eligibility  of the product in company systems. RIA(Rich Internet Application): This is aimed to implement functional software in web applications. In J2EE this can be related to JSF, ZKoss frameworks. SRS(Software Requirements Specification): is a comprehensive description of the intended purpose


The relational algebra consists of: a set of eight operators (which ones?) and a relational assignment operation The relational assignment operation allows us to assign a name to the result of a relational expression, for example if we take the product of two relations A and B, then: C ← A X B shows that

Relational Integrity

The relational database schema for The Suppliers and Parts database is shown below: S    (Sno, Sname, Status City) P    (Pno, Pname, Color, Weight, City) SP   (Sno, Pno, Qty) A superkey is an attribute (or set of attributes) that uniquely identifies a tuple in a relation For example the combination Sno,Sname uniquely identifies a tuple in S. A candidate

Relation Model

Relation – A table with columns and rows. Attribute – A named column of a relation. Domain – The set of allowable values for one or more attributes. Tuple – A row of a relation. Intension – The structure of a relation (i.e. its attributes), together with a specification of the domains and any other restrictions on possible values. The structure