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Explain the two types of participation constraint. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates i
#question benefits and limitations of data models..
explain cascading rollback
The basic merits of decomposition. The Advantages of Decomposition 1. Separate person can work on each subsystem. 2. A particular software engineer can specialize in a
System level permissions : With the use of data dictionary you can view them. Let us take the table name as user_sys_privs (used in oracle). DESCRIBE USER_SYS_PRI
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
In the architecture of a database system which external level used? In the architecture of a database system view external level used.
Explain Strict Two-Phase locking A transaction T does not release any type of its exclusive (X) locks until that transaction commits or aborts. In this method no other transact
What are axioms? Axioms or rules of inference give a simpler technique for reasoning about
how many types of data model in DBMS? explain data abstraction with its different level
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