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Why are cursors necessary in embedded SQL?
A cursor is an object used to store the output of a query for row-by-row processing through the application programs. SQL statements operate on a set of data and return a set of data. Instead, host language programs operate on a row at a time.
The cursors are used to navigate by a set of rows returned through an embedded SQL SELECT statement. A cursor could be compared to a pointer.
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The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
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Ask questiwhat is row indicator in database on #Minimum 100 words accepted#
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