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What are shortcomings in structured approach?
Structured methodology treats data and their behaviours separately, and this makes it harder to isolate changes. If changes are required in software then one has to change both data structure and algorithms and these changes subsequently need changes in the algorithms where this data structure is used as very well.
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
what is attribute is attribute inheritance in dbms?
Explain the two types of participation constraint. 1. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates i
Explain CNT in the respects of QBE ? CNT: It is one of the aggregation commands given in QBE. It is used to identify number of tuples
Define the terms 1) physical schema 2) logical schema. Physical schema: The physical schema explains the database design at the physical level, which is the lowest level of abs
External failure : A failure can also result because of an external cause, such as earthquakes, fire, floods, etc. The database must be duly backed up to avoid troubles occurring d
sql is relationally complete-justify
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
explain in detail about crash recovery
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