So far, we have discussed the top-down approach, which focuses on decomposing raw information of different forms into attributes on data tables and setting criteria that we believe constitute a…
Database design typically involves three main levels: conceptual, logical and physical. At the end of the conceptual stage, an Entity-Relationship Diagram (ERD) can be created, illustrating all identified entities along…
Abilities to define and enforce database constraints is one of the advantages that a Database management system provides, along with ability to control redundancy, restrict unauthorized access and persistently store,…
Data modeling is a critical step of database design. It involves translating business requirements about data into a technical blueprint. Data modeling is applied to build new databases or to…
SQL (Structured Query Language) is used to extract information from data stored in a Relational Database (RLDB). A RLDB consists of multiple tables, each containing rows and columns to record…
