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What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
Explain retrieval in QBE? Retrieval in QBE : A "GUI" for expressing queries. Based on the Domain Relational Calculus (DRC) Actually invented before GUIs. Very co
List any eight applications of DBMS. a) Universities b) Airlines c) Banking d) Credit card transactions e) Tele communication f) Sales g)Finance h) Manufac
Using Literal Character String Example: To print IS A as one string with column name employee SELECT ENAME || ' IS A ' || JOB AS "EMPLOYEE" FROM EMP;
What is a PROJECT operation? The project operation is a unary operation that returns its argument relation with particular attributes left out. Projection is shown by pie (π).
what is the need of a log in dbms
What is RDBMS terminology for a row? A tuple is a RDBMS terminology for a row
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
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