Data System, Operational Data, Data Independence, Architecture for a Database System, Distributed Databases, Storage Structures : Representation of Data. Data Structures and Corresponding Operators: Introduction, Relation Approach, Hierarchical Approach, Network Approach.

Relational Data Structure : Relation, Domain, Attributes, Key Relational Algebra - Introduction, Traditional Set Operation. Attribute,Attribute names for derived relations - Special Relational Operations

Operations not involving cursors, involving cursors – Dynamic statements, Query by Example – Retrieval operations, Built-in Functions, update operations - QBE Dictionary. Normalization : Functional dependency, First, Second, Third normal forms, Relations with more than one candidate key, Good and bad decomposition.

IMS data structure - Physical Database, Database Description- Hierarchical sequence - External level of IMS : Logical Databases, the program communication block IMS Data manipulation : Defining the Program communication Block : DL / 1 Examples.

Architecture of DBTG System. DBTG Data Structure : The set construct, Singular sets, Sample Schema, the external level of DBTG – DBTG Data Manipulation.