When a database table has a key which consists of more than one field, a partial key refers to any one of those fields.
When a database table has a key which consists of more than one field, a partial key refers to any one of those fields.
what is rdbms and its application
yes it is a rdbms
IT is a candidate key chosen by database designer as a principal means for uniquely identifying each row in a table.
every rdbms is a dbms.as of a standard there is a criteria for any prog. lang. to become rdbms. this is defined in codds 12 rules. this all together if satisfied then any prog lang can be said to be a rdbms. but in practice we come across many examples where a prog lang is not rdbms but still provide relational database very often. ex foxpro is not rdbms because it does not satisfy one of the codds 12 rule i.e. of defining a foreign key. in foxpro you cannot define a foreign key. but since it has tables in it and can provide relations we can term foxpro as pseudo rdbms(partial rdbms)..........
It is boyce-codd normal form IN NORMALIZATION WHICH SHOULD BE IN 3NF and EVERY DETERMINAT IS A CANDIDATE KEY .
1. relational database management system(RDBMS) 2. object Rdbms. 1. relational database management system(RDBMS) 2. object Rdbms.
AnswerMySQL, like most modern Database Management Systems is based on the relational model. So it is a RDBMS (Relational Database Management System).
RDBMS is all about Relational Data Base Management System...
A foreign key constraint is used to represent a relationship in a RDBMS (relational database management system).
No, but some RDBMS's are available on multiples OS's (Oracle, for example: Windows, unices, bs2000... ).
which is basically an RDBMS in which object oriented feature are implemented