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Advantages of Data Distribution The primary benefit of distributed database systems is the ability to access and share data in a reliable and efficient manner.
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
find a name whose address is erode from student table
Consider the relation schemas as follows. works (person name, company name, salary); lives (person name, street, city); located in(company name, city); managers (person name
PRINCIPLES OF DATABASE 1. State the following terms: a) Database b) Database Management System c) Entity d) Attribute e) Relationship 2. Discuss the Three Level Architecture
Describe the definition of a transaction in SQL Ans: The SQL transaction starts implicitly. Transactions are finished by either Commit work that commits the transaction and st
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
explain participation constraints with examples
write-set(T): Each data items that are written by a transaction T
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