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Explain data dictonary on oracle ?
Data Dictionary - Data dictionaries are the system tables in which contain descriptions of the database objects and how they are structured.
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
A set of possible data values is called? A set of possible data values is called as domain.
#what is cursor its uses ? Explain it
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
1. Which relational algebra operations do not need the participating tables to be union-compatible? Ans: Join is the relational algebra operations that do not need the particip
what is relationship inheritance and attribute inheritance
Given the subsequent relations: vehicle (reg_no, make, colour) Person (eno, name, address) Owner (eno, reg_no) Write expressions
difference between MIS and DSS
What are the problems if one were not to normalize? When do these problems surface? Ans: Database normalization, sometimes considered to as canonical synthesis, is
What is a Built-in A notation of identity is built-into the data model or programming language and no user-supplied identifier is needed. This form of identity is used in objec
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