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What is Gathering information and Producing ERD Gathering information: This could be a written document that explains the system in question with reasonable quantity of detai
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
What are the disadvantages of file processing system? The drawbacks of file processing systems are a) Data redundancy and inconsistency b) Complexity in accessing data
define attribute inheritance with example?
Describe the Composite Key Composite Key: Sometimes one key is not enough to uniquely recognize a row. E.g. in a single class Roll is enough to search a student, but in the w
Objectives After reading this part, you should be able to: Modify, create, and delete database schema objects; Update database using SQL command; Retrieve data f
#question.what is mapping constraints and types?.
Database systems have many opposite efforts ?
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
explain ER Modeling?
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