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Explain the Difference between DROP and DELETE
DELETE deletes one or more than one tuples of a particular relation from the database. DROP is employed to remove a table from the schema. While DROP removes the definition of the relation also the data in the given relation, delete only deletes the tuples but keeps the table definition.
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
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
Describe the algorithm for updating indices for a single level index when a record is (i) Inserted (ii) deleted What will be the modification if there are multilevel in
What are the properties of transaction? There are three properties of transactions :- A) Atomicity B) Consistency C) Isolation
What is an object design? Object design is a very interactive method, which decides the relationship among objects, classifies operations on classes, determines overall system
intent locking
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
The Second Normal Form (2NF) Definition: A relation is in 2NF if it is in 1NF and each non-key attribute is fully dependent on each candidate key of the relation. Some of th
(A) For the relation; CarSales (RegNo, BuyerName, Address, SalesPerson, Make, Model, Commission) The following functional dependences hold, RegNo _ID à Make, Model Reg
An ideal data dictionary should have everything a DBA wants to know about the database. 1 Conceptual, External, and internal database descriptions. 2. Descriptions of attr
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