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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.
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
What type of view of total database content? Data base content Conceptual view of total database contain.
WHAT IS DBMS
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