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Define the following constraints for the table client.
(i) BAL_DUE must be at least 1000.(ii) NAME is a unique key.
(i)ALTER TABLE CLIENT ADD CONSTRAINT CLIENT_BAL_DUE_C1 CHECK(BAL_DUE < 1000); (ii) ALTER TABLE CLIENT ADD CONSTRAINT CLIENT_NAME_U UNIQUE(NAME);
Differentiate between join and outer join? Outer joins return all rows from at least one of the tables or views mentioned within the FROM clause, as long as those rows get toge
what is meant semantic query optimization? how does it differ from other query optimization techniques?
We face problem of stock Opening balance and closing balance in Minus
The Conceptual Level or Global level The conceptual level presents a logical view of the complete database as a unified whole. It permits the user to bring all the data in th
What is RDBMS terminology for a row? A tuple is a RDBMS terminology for a row
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
define lock conversion
complete assignment on the above title.
Conversion of entity sets: I) For every strong entity type E in the ER diagram, we make a relation R containing all the easy attributes of E. The relation R pri
What does the cardinality ratio specify? Mapping cardinalities or cardinality ratios state the number of entities to which another entity can be associated. Mapping cardinaliti
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