a different arrangement of the same elements in the wordskot(cat) andtok(current) changes the meaning of the words. At the same time, any relation characterizes precisely those things between which it exists. For example, the relation “less than” or “greater than” characterizes quantities;...
MostofB.microcomputerDBMSadoptrelationaldatamodel C.representsarelationalmodelwithatwo-dimensionaltable, andisoneofitsmajorfeatures D.doesnothaveconnectionoperationsandDBMScanalsobe relationaldatabasesystems Answer:D 2.relationaldatabasemanagementsystemsshouldbeableto ...
Called surrogate keys, the values for these artificial keys have no intrinsic meaning, such as a FacultyID value of “T1234” or an Employee_Number of “387.” In theory, ER should never be a problem in a well-designed database because two entity instances should be equivalent if, and ...
For example: a DBMS object such as a data page (identified by the filename and location inside the file), table (OID in the system catalog), or table row (the page and offset inside it) can be a resource. A memory structure such as a hash table, buffer and so forth (identified by...
For example, a different arrangement of the same elements in the words kot (cat) and tok (current) changes the meaning of the words. At the same time, any relation characterizes precisely those things between which it exists. For example, the relation “less than” or “greater than” ...