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WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
Package classes and associations into models Programs are made of separate physical units which could be edited, imported, complied or otherwise manipulated. The careful part
A domain is a set of permissible values that can be given to an attribute. So each attribute in a table has a definite domain. Values to these attributes cannot be assigned outside
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
What are the Requirements of algorithm designer Algorithm designer should: i) Select proper algorithm so as to minimize implementation cost ii) Find most appropriate d
Which data manipulation command combines the records from one or more tables ? JOIN data manipulation command combines the records from one or more tables.
Define Direct file organization? The direct file organization is employed to enhance the performance in accessing the records than sequential file organization. In direct file
Differentiate between join and outer join? Outer joins return all rows from at least one of the tables or views mentioned within the FROM clause, as long as those rows get toge
Wait-die" scheme : The idea is based on non-preventive method. It is based on a simple rule: If Ti requests a database resource that is held by T
What are the comparison operator in SQL? Comparison operator in SQL are =, LIKE and BETWEEN
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