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Explain three main attributes of data.
What is a hash index? A hash index organizes the search keys, with their associated pointers, into a hash file structure.
What is Cross Product? Simply Cross product is Binary Operator
List any two disadvantages of a database system ? The disadvantages of database system are: • Database systems are difficult, complex, and time-consuming to design. • Substanti
Describe the Composite Key Composite Key: Sometimes one key is not enough to uniquely recognize a row. E.g. in a single class Roll is enough to search a student, but in the w
I need help for my Uni assignments
Complete replication: It implies maintaining of a whole copy of the database at every site. Thus, the reliability & availability and performance for query response are maximized.
how to construct labelled precedence graph for view serialiability.please explain insteps with one solved examples
A field-groups statement or an insert statement reverses storage space and transfers values. False.
Views in relational algebra: 1. Basic expression contains either a) A relation in the database. b) A constant relation. 2. General expressions are madde out of sma
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