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What it creates while a primary key is combined with a foreign key?
It creates Parent-Child relation ship between the tables that connect them while a primary key is combined with a foreign key.
Project Description: We have an encrypted HSQL Database which we want to change into csv format. HSQL DB . We have java application (jar file) which reads that database but n
Differentiate between horizontal & mixed horizontal fragmentation?
State as Location within a Program In this traditional approach, location of control inside a program totally defines the program state. Any finite state machine may be implem
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Explain the concept of QBE? Query-by-example represents a visual/graphical approach for accessing information in a database by the use of query templates called as skeleton tab
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
The Incident table, with an auto-incrementing incident number, etc, looks like: incident_num reporter date time incide
Clustering Indexes It may be an excellent idea to keep data of the students in the order of the programme they have registered as most of the data file accesses may need studen
explain in details about one to one binary relationship
What is Trigger? A trigger is a SQL procedure that initiates an action when an event (INSERT, DELETE or UPDATE) occurs. Triggers are kept in and managed by the DBMS. Triggers a
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