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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 which enable the user to name a private memory field to hold an exact statement for access at a later time.
Cursors are used to procedure multi-row result sets one row at a time. In addition, cursors remain track of which row is currently being accessed, that permit for interactive processing of the active set.
It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
What is schema
why are older data models are being replaced by new data models
Create centralized relational database using Top down method- Construction of Logical Model: Translation EERD into Relational Schema: Use the 8 steps algorithm of converting EERD
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
explain five responsibilities of DBA?
average response time?
What is the meaning of Recovery? In deferred update methods, if a transaction fails before arriving its commit point, it will not have altered the database in any way, so UNDO
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