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What are the three classes of SQL expression?
SQL expression consists of three clauses:
Select
From
Where
HOW MANY TYPES OF VIEWS
What is a hash index? A hash index organizes the search keys, with their associated pointers, into a hash file structure.
What are the uses of ODBC? Under what circumstances we use this technology? ODBC expose database capabilities within a standardized way to the application programmer by an ap
What are the features of embedded SQL? Explain. Embedded SQL - SQL could be implemented within two ways. It can be used interactively or embedded in a host language or throu
Question 1: (a) Planning and management of ICT projects have a very poor record in developing countries. Briefly explain five critical success factors for correct implementa
What is difference among mysql_connect and mysql_pconnect? Mysql_connect() opens a new connection to the database while mysql_pconnect() opens persistent connection to the data
external and internal mapping with examples
Define blocks? The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
How external/conceptual mapping and conceptual /internal mapping is performed
Use of partial data by applications : In common, applications work with views rather than whole relations. Thus, it may be more appropriate to work with subsets of relations rather
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