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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 new classes and objects and these derived classes must be updated if any of the base objects is changed.
What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
What is the meaning of Data independence? Data independence means a programs that are not dependent on the physical attributes of data and a programs that are not dependent on
explain in detail about crash recovery
i am not clear with the climetic condition of the north indian plain. can u plz explain it for me
The ABC Bank authority now wants to create a database for their customers. So you are requested to modify your program of Assignment A3 as follows. The main program first displa
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
Describe the four main ways of optimising disk block access. Ans: a. Disk b. Non-volatile writes buffers c. File organization (Clustering) d. Log-based file system
What is schema
The issues relating to the Design of the Physical Database Files Physical File is a file as stored on the disk. The major issues relating to physical files are: • Cons
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