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What are the Constituents of File? Also elaborates all the possible file operations?
A file is organised logically as sequence of record. These records are mapped onto disk blocks. Although blocks are of fixed size denoted through the physical properties of the disk and through the operating system, record sizes vary. In a relational database, tuples of distinct relations are commonly of different sizes.
Possible operations on a file: (i) Create: a file can be created (ii) Delete: a file can be deleted (iii) Changing attributes of a file: The attributes of a file say read only, author's name etc. can be changed. (iv) Contents of the file can be altered.
Define Assertions in SQL a. An assertion is a predicate that is expressing a condition we wish the database to always satisfy. b. Domain constraints, functional dependency
Show, with the help of an example, that relatively high-level transitions result when system or program is stimulated by the outside events. In diagram below, we can observe i
Implementation and SQL Applications
Atomicity: It describes a transaction to be a one unit of processing. We can also say either a transaction will be finished completely or not at all. In the transaction example 1
Example -GRANT CREATE SESSION TO MCA12; (This command gives system level permission on creating a session - not portable) GRANT SELECT ON EMP TO MCA12; (Object level permi
in case of functional dependencies how we get the higher normal form.
Project Description: I would like to get a database of a website which has clients email name and phone number. If you are able to get information from a website, by entering
Project Description: Oracle Certified Professional with 20 years of practice, Oracle version 6.0.34, 7.3, 8.0, 8i, 9i, 10G, 11G, 12C. Crossplatform migration, Informix, MSSql
Demonstrate the UML model Using UML, it is possible to generate code in any of the programming language from UML model (called forward engineering) and rebuild a model from an
What are the Constituents of File? Also elaborates all the possible file operations? A file is organised logically as sequence of record. These records are mapped onto disk blo
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