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multidimensional data model
The Concurrent Transactions Almost every commercial DBMS support multi-user environment. Therefore, allowing multiple transactions to proceed concurrently. The DBMS must make
what is bogus empowerment. And what is genuine empowerment
lock and types of lock
employee(empid,empname,dept,telno,mobno, add,sssno,tinno,WEdates,WEcomp,WEadd,WEpos,WEres) this is a employee record which is need to be normalize.the WE means work experience
Explain the term- Periodic recomputation Periodic recomputation: Base values are often updated in bunches. Sometimes, it is possible to just recompute all derived attributes p
I need help with some assignments
Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→ a, ab → d, a → b, d → c}, i.e. what are all of the FDs implied b
Explain What is Relation? A database relation is a predefined row or column format for storing information in a relational database. Relations are equal to tables.
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
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