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What is transaction?
Collections of operations that form a single logical unit of work are known as transactions.
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
I have been given 8 differebt data warehouseing failure case studies. I need to question 4 questions for each
example of embedded SQL query
What are the advantages of having an index structure? Ans: The index structures commonly provide secondary access paths, which offer alternative ways of accessing the reco
Suppose an instruction takes 1 nanosecond to execute (on average), a page fault takes 20 microseconds of processor time, and it takes 300 microseconds of disk time to read or write
Given the following set of functional dependencies {cf→ bg, g → d, cdg → f, b → de, d → c} defined on R(b,c,d,e,f,g) a. Is cf→ e implied by the FDs? b. Is dg a superkey?
Replication : It is definite as a copy of a relation. Every replica is stored at a dissimilar site. The alternative to replication is to store only single copy of a relation which
Explain the Functional Mode with help of an example. Functional Model The functional model shows a computation and functional derivation of data values in it without ind
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
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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