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what is view?explain
Column Constraints: NOT NULL, UNIQUE, CHECK, PRIMARY KEY, DEFAULT, REFERENCES, On delete Cascade : Using this key whenever a parent row is removed in a referenced
Explain weak and strong entity type ? Weak and Strong entity type: An entity set which does not have a primary key is referred to as a weak entity set. The existence of a wea
Which operations need the participating relations to be union compatible? A UNION, INTERSECTION and DIFFERENCE operations need the participating relations to be union compatibl
draw er diagram using entities crop,employee,department,plot,cultivation plan,machinery,seed,fertilizer
a need some real life examples of database management systems three level of ANSI SPARC architecture life teacher and student ,company and employee or for NGO etc.
Short Note on mid Square Method of hashing? Mid square method of hashing: In the method midsquare hashing, the key is squared and the address selected from the center of the s
I have been given 8 differebt data warehouseing failure case studies. I need to question 4 questions for each
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
What is recovery management component? Ensuring durability is the responsibility of a software component of the base system known as the recovery management component.
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