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What is a disjoint less constraint?
Ans: It needs that an entity belongs to no much more than one level entity set.
Disjoint less constraint needs that an entity belongs to no more than one level entity set. (the meaning of Disjoint less constraint is that an entity can be a member of at most one of the subclasses of the specialization.)
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
What should be declared explicitly in the corresponding ABAP/4 Statements to access internal tables without header lines & why? Work Area. This is needed as the Work Area is
What is a trigger
explain normalization,and give the examples 1NF,2NF,3NF,BCNF.AND FUNCTIONAL DEPANDENACY AND DECOMPOSITION TECHNIQUES.
What are the Constituents of File? Also elaborates all the possible file operations? A file is organised logically as sequence of record. These records are mapped onto disk blo
Define Query by Example QBE is a query language relies upon domain calculus and has two dimensional syntax. The queries are written in the horizontal and vertical dimensions of
Ask questioYou are the database administrator in a university. You have been tasked to come up with a new database for the University. Using the stages in Database Life Cycle come
By using the delete operation some consisting records can be deleted from a relation. To delete some definite records from the database a condition is also specified based on which
Order by clause By using this rows can be sorted It is used in the last portion of select statement By default it gets ascending order DESC: is used
What is DML compiler? DML Compiler: Translates DML statements in a query language within low level instructions understandable through the query evaluation engine. Attempts to
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