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Write short notes on relational model
The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an example of a record based model.
explain thee diffrent types of data models
What is system log? What are the entries? Ans: The system log that is generally written on stable storage contains the redundant data required to recover from volatile
what problems are raised by the database? why is it so controversial? why is data quality an issue?
as a customer service employee explain five measures you would recommend to make even a displeased students patronize the school canteen
i would like to ask if you will do assignment of database number of words 1500 and how much
#question.ERD of any car
A relation instance indicates as r is a collection of tuples for a given relational schema at a exact point of time. A relation state r of the relation schema R (A 1 ,A 2 ,.....
Creation of Indexes Automatically: When a primary key or Unique constraint is show in a table definition then a unique index is formed automatically. Manually: User can
Shared lock or Read Lock It is requested by a transaction that needs to just read the value of data item. A shared lock on a data item does not permit an exclusive lock
differences between a classified catalog and a dictionary catalog
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