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how many hourse have been spent on a certain project
er diagram on cosmetics.
Which model is record based logical model? Network Modelis basically known as record based logical model.
To eliminate duplicate rows (distinct operator) Example: SELECT DISTINCT DEPTNO FROM EMP;
In which form of relational database developer refers to a record? In a tuple form of relational database developer refers to a record.
What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
Define cardinality and participation constraints on a relationship type, completeness constraint on generalization. Ans: Cardinality defines the number of entities to wh
Discuss The difference between drop table R and delete from R. DROP TABLE command deletes all the records with the table definition. This command will automatically committed
Which operation is used if we are interested in only certain columns of a table? PROJECTION operation is used if we are interested in only certain columns of a table.
What disadvantage of ODBC does OLE DB overcome? By breaking the features and the methods of a DBMS into COM objects, OLE DB characteristic overcomes a main disadvantage of ODBC
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