Database management system is full form of DBMS . Characteristics of a DBMS are following : 1) It maintains data integrity. 2) It reduces redundancy. 3) make access to data easy.
SOURCE: http://jeenuutreja.blogspot.in/2012/07/actors-on-scene-in-dbms-in-this-topic.htmlI'd copy paste this here but these guys have earned a visit!
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prime attributes are the attributes of a candidate key which will give uniqueness. a candidate key is (the subset of superkey) which gives uniqueness. Super key is the maximum set of attributes that can provide uniqueness example ABCDE is a super key AB CD DE are the candidate keys s.t. AB is the primary key. CD and DE are the secondary/alternate keys.
It is the DBMS that ensures the value of the foreign key matches another table's primary key when referential integrity constraints are enabled within the DBMS
In dbms with m attributes 2^m-1 keys are possible. BY-ROHIT
secondary index is a key which is created other than primary key, to speed up processing.
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It is a pool of data through which data are enter into into the table for data management.
A software system that facilitates the creation and maintenance and use of an electronic database
Types of Attributes in Dbms areKey or non key attributesRequired or optional AttributesSimple or composite AttributesSingle-valued and multi-valued AttributesStored, Coded or derived Attributes
Prime attribute are part of any candidate key. Non-prime attribute are not part of any candidate key.
I think super key is treated as the primary key because in a table their will be only one primary key.
NA_ what are highlights of advanced DBMS what are highlights of advanced DBMS what are highlights of advanced DBMS
A Super key and composite key are similar to one another. Both of them are used to uniquely identify a row in a database table. A super key is a set of columns within a table that can be used to identify a particular row in a table. A super key can be only one column or a combination of multiple columns. If a super key contains multiple columns it becomes a composite key.