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What is the use of integrity constraints?
Integrity constraints make sure that changes made to the database by authorized users do not result in a loss of data consistency. Therefore integrity constraints guard against accidental damage to the database.
Draw the precedence graph of the following schedule and determine whether the schedule is serializable. (Note that all instructions, except lock and unlock, are omitted. We assume
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
What are the object-oriented approaches Software systems which are designed with structured design methodology never support some of desired quality attributes for example reus
Show, with the help of an example, that relatively high-level transitions result when system or program is stimulated by the outside events. In diagram below, we can observe i
Removing a Synonym: DROP SYNONYM D30;
What is completeness constraint on generalization? Define the variation between total and partial design constraint. Give an example each. Ans: Completeness Constraints
complete er diagram of textile industry management
Explain what is Aggregation? Aggregation: Aggregation is an significant concept in database design whereas composite objects could be modelled during the design of database a
What are the benefits of OOA technology? Using OOA technology can produce many benefits, such as: i) Reusability of code ii) Productivity is gained through direct mappi
Project: Microsoft Access You have been asked by the ABC Tanning Salon to create a database that can be used to track the salon's customers. You are to create a table in Access
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