Terminology Define the terms data definition language, data manipulation language, data models, schema, and subschema. Describe a hierarchical database model. Construct a corresponding tree structure given a database definition. Construct a corresponding application program view of data given a program specification block. Discuss the necessity of logical structures in the hierarchical model.
Logical pointers Explain the purpose of logical pointers.
Explain redundant data elimination using logical structures. Describe a network data model. Task group Explain the implications of database task group in relation to the network model. Logical structures State the relationship between a network schema and the corresponding data structure. Models Compare and contrast hierarchical and network models.