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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
CREATE TABLE prodtrans ( pno number (4) ptype char (1) CHECK (ptype in ('I','R','S')), qty number (5) FOREIGN KEY pno REFERENCES product (pno) ON DELETE CASCADE);
What are the various symbols used to draw an E-R diagram (any 3)?
Which are the two ways in which entities can participate in a relationship? Total and partial are the two ways in which entities can participate in a relationship
define lock conversion
ADVANCE OBJECT DESIGN Introduction Analysis is the initial step of the OMT methodology. It is apprehensive with devising a precise, concise, correct and understandable mo
what is cascading? what is rollback cascading? please explain in detail
File Organisation In Dbms Introduction Databases are used to store information. Usually, the principal operations we have to perform on database are those relating to:
What is Explicit update In explicit update, each derived attribute is defined with respect to one, or more fundamental base object(s). The object designer determines that de
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
to develop elrctronic database from manual forms
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