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object oriented database
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
wh
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken from the similar
what is the importance of back up files
Create centralized relational database using Top down method- Construction of Logical Model: Translation EERD into Relational Schema: Use the 8 steps algorithm of converting EERD
Example :; transfers transfer_amount from x's account to y's account ; Supposes x&y both accounts exist TRANSACTION (x, y, transfer_amount) Start transaction IF X AND Y
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
WHAT IS DATABASE TECHNOLOGIES
What is System R? What are its two major subsystems? System R was intended and developed over a period of 1974-79 at IBM San Jose Research Center. It is a prototype and its pur
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