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By using the delete operation some consisting records can be deleted from a relation. To delete some definite records from the database a condition is also specified based on which records can be taken for deletion.
Constraints that can be violated during deletion
Only one type of constraint can be violated during deletion, it is referential integrity constraint. It can happen when you want to delete a record in the table where it is referenced by the foreign key of another table. Please read the example given below very carefully.
Describe analysis of access paths To describe analysis of access paths, consider an example of the design of a company's employee skills database. A part of the object model fr
What disadvantage of ODBC does OLE DB overcome? By breaking the features and the methods of a DBMS into COM objects, OLE DB characteristic overcomes a main disadvantage of ODBC
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Explain Data Dictionary in short?
What types of adjustments are required to increase chances of inheritance. a) Some attributes can be added or ignored in the base class operation b) Some changes can be
How can you map NULL values to other values while display? IF( ) , IFNULL( ) keywords are used to do so. They are 'LIMIT' is used for the following kinds of problems: 1) Ans
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What are called multilevel indices? Indices with two or more levels are known as multilevel indices.
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
Explain different categories of failures that occur in Oracle database? Categories of Failures - In Oracle database subsequent types of failures can occurred: Statement Failu
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