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Define Forms Based Interfaces?
Forms-Based Interfaces - A forms-based interface display a form to each user. Forms are commonly designed and programmed for naive users and interfaces to canned transactions. Several DBMSs have forms specification languages.
Explain cursors in SQL? Cursors in SQL - An object used to store the output of a query for row-through-row processing through the application programs. Cursors are constructs
What is called a query -execution engine? The query implementation engine takes a query evaluation plan, implements that plan, and returns the answers to the query.
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
What are the features of embedded SQL? Explain. Embedded SQL - SQL could be implemented within two ways. It can be used interactively or embedded in a host language or throu
various techniques of hashing?
Automated system for appointment with sms and call confirmation with service providers and user has to be initiate automatically. After selecting time and date to use service, s
construct an er diagram for a hospital with a set of patients and a set of medical doctors. associate with each patient a log of various test and examination conducted.convert er d
Insertion Anomaly: Inability to show certain information-The primary key of the over relation be (enrolment number, Cno). Any new tuple to be inserted in the relation should have
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
Lock Based Protocol A lock is nothing but a mechanism that tells the DBMS whether a particular data item is being used by any transaction for read/write purpose. As there are t
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