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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 is meant by heuristic optimisation? Discuss the main heuristics that are applied during query optimisation. Ans: In heuristic optimization, heuristics are employed to r
Birla Institute of Technology & Science, Pilani Work-Integrated Learning Programmes Division Second Semester 2012-2013 EC-1 Assignment 2 (7.5% of the grade) Course No. : SS ZG
1. Which relational algebra operations do not need the participating tables to be union-compatible? Ans: Join is the relational algebra operations that do not need the particip
What is ICR? A. ICR (Intelligent Character Recognition) is a technology that gives scanning and imaging systems the ability to identify images of hand-printed or script charact
For problems 1-4, give all candidate keys for the tables with FDs specified. Composite candidate keys must be put in parentheses, and candidate keys must be separated with commas
Support by Adding Indexes Multiple indexes can be used to access a data file by multiple access paths. In such a scheme only single copy of the data is consider, only the numbe
How to create a biological database based on viruses. How to decide which attribute should be there in the table and schema? How to identify the primary keys, foreign keys, domain,
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
In which format database schema is written ? Data base schema is written in the DDL format.
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