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Failure Controlling Methods:Failures can be handled using different recovery methods that are talk about later in the unit. But the first question is doing we really require recovery techniques as a failure control mechanism? The recovery methods are somewhat expensive both in terms of memory space and in time for small systems. In such a case it is more useful to better avoid the failure by some checks instead of deploying recovery method to make database consistent. Also, recovery from failure includes manpower that can be used in some other productive work if failure can be avoided. It is, thus, main to find out some general precautions that help in controlling failure. Some of these precautions might be:
Though, it may be noted that if the database system is significant it must use a DBMS that is suitably equipped with recovery measures.
Define NULL value NULL value NULL means something is unknown. It does NOT mean null (the digit 0). Null is as well employed as attribute value for a particular entity in which
wrie a report on whether a BSc n information systems develops the skills required by employers in Database administration
example of bank
Views in relational algebra: 1. Basic expression contains either a) A relation in the database. b) A constant relation. 2. General expressions are madde out of sma
How can you terminate the MySQL Server? Typing the following in Command prompt will shut down the server completely as root user % mysqladmin -u root -p shutdown
note on hashing technique
Show a centralised schema to support the operation of the system you have chosen, including in particular: the product catalogue; the outlets and respective stocks; customer record
Explain ODBC? ODBC - Open DataBase Connectivity (ODBC) enable the integration of SQL along with a general-reasons programming language.
Database Errors: An error is said to have occurred if the implementation of a command to manipulate the database cannot be successfully finished either due to inconsistent data or
Which model is record based logical model? Network Modelis basically known as record based logical model.
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