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Give the general form of SQL query?
Select A1, A2............., An
From R1, R2..............., Rm
Where P
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
various techniques of hashing?
What is the role of a database administrator?
Describe the statement in SQL which allows to change the definition of a table? In SQL Alter statement is used to allow the changes the definition of a table.
What is MySQL? MySQL is a relational database management system which has eleven million installations. It can be used for both Linux and Window. Managing database includes add
What is conceptual model ? A conceptual model is a independent of both hardware and software.
What is Candidate Key Super Key or Candidate Key: It is such an attribute of a table that can uniquely recognize a row in a table. Generally they have unique values and can n
#question.ERD of any car
What is substitutability? Any method of a class-say A can equally well be adjured with any object belonging to any subclasses B of A. This characteristic leads to code reuse, a
Saving Derived Attributes to Avoid Re-computation Data that is derived from other data should be stored in the computed form to avoid re-computation. For this, we could define
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