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Explain five duties of Database Administrator?
1. DBA administers the three stages of the database and, in consultation along with the whole user community, sets up an definition of the global view or conceptual level of the database.2. Mappings among the internal and the conceptual stages, as well as among the conceptual and external levels, are also defined through the DBA.3. DBA ensures in which appropriate measures are in place to manage the integrity of the database and in which the database is not accessible to unauthorized users.4. DBA is responsible for granting permission to the users of the database and stores the profile of each user within the database.5. DBA is responsible for defining process to recover the database from failures along with minimal loss of data.
what is view?explain
Events4Fun is an event management company in Europe with branches in South America as well. The company is well-known for its efficiency, good-quality services, and affordable char
I need a professional to prepare a database to collect and store basic information. The information can be basic info such as contact details etc. One requirement i have is f
Improved Reliability: In a centralised DBMS, a server failure stops the operations of the DBMS. Though, a failure at single site of a DDBMS, or a failure of a communication link cr
What is Alternate Key Alternate Key: This is the candidate key which is not taken as the primary key of the table. They are named so because although not the primary key, the
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
Question: Data Mining is the process of extracting knowledge hidden from large volumes of raw data. (a) Using a suitable example, illustrate how Data Mining can be useful t
Consider the relations City (city_name, state) Hotel (name, address) City_hotel (hotel_name, city_name, owner) Answer the following queries in relational algebra (i) Find
What is Hierarchical DBMS In HDBMS, data is structured in a tree like manner. There is a parent-child relationship between data items and the data model is very suitable for re
entity relationship diagram for online examination system
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