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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.
What are the disadvantages of relational approach? Disadvantages of relational approach: • Substantial hardware and system software overhead • May not fit all business models •
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
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What is Relational calculus? Relational calculus is a Non- Procedural language.
What are the two types of indices? The two types of indices are:- A) Dense index B) Sparse index
Explain the functions of data manager? Functions of Data Manager : - Convert operations in user's queries coming directly through query processor or indirectly in an applicatio
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
What are the various symbols used to draw an E-R diagram (any 3)?
The database will enable college administrators the ability to track students initial major. This will help college officials decide how best to prepare students for their goals an
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