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database transforming data models into database designs
1. Cascading updates refers to child rows being automatically deleted when a parent row is deleted.
(A): False
(B): True
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QA->P, Q, R are three towns on a river which flows uniformly. Q is equidistant from P and R. A man rows from P to Q and back in 10 hrs. He can row from P to R(upstream) in 4 hrs. The ratio of speed of man in still water to the speed of the current is:....
QA->P, Q, R are three towns on a river which flows uniformly. Q is equidistant from P and R. A man rows from P to Q and back in 10 hrs. He can row from P to R(upstream) in 4 hrs. The ratio of speed of man in still water to the speed of the current is....
QA->A man can row at 5 km/h in still water. If the river is running at 1 km/h, it takes him 75 minutes to row to a place and back. How far is the place?....
QA->In a row of girls A is 11th from one end and 7th from the other end. How many girls are there in the row.....
QA->What function displays row data in a column or column data in a row?....
MCQ->Cascading updates refers to child rows being automatically deleted when a parent row is deleted.....
MCQ->When the parent entity is required, cascading updates and cascading deletions should be allowed or the associated actions on the parent should be prohibited.....
MCQ->When the child entity is required, we are restricted from creating a new parent row without also creating a corresponding child row at the same time.....
MCQ->In a _____ a parent record type can be linked to one or more "child" record types, but a child record type can have only one parent.....
MCQ->If a relationship has a cascade updates constraint, then if ________ in the parent table is changed, then the same change will automatically be made to any corresponding foreign key value.....
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