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What is candidate key?
Candidate Key - A candidate key of an entity set is a minimal superkey, which uniquely identifies each row in the relation.
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Question: Describe briefly the three parts of the Relational Model. (a) The term integrity refers to the accuracy or correctness of the data in the database. Define the fol
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Describe the types of Inheritance 1. Single inheritance 2. Multiple inheritance 3. Hierarchical inheritance 4. Multilevel inheritance
How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
The database files accept the actual data and are typically the biggest in size. Depending on their shape, the tables for all the user operation can go in one database file-but
Assigning Responsibility for Operation Many operations might have obvious target objects, but some of these operations could be used at numerous places in an algorithm, by one
The State of Newyork certifies firefighters throughout state keep track all of them, as well as the state’s of fire departments. Each fire department has unique department number
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
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