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Explain the EXISTS and UNIQUE functions of SQL. Give an example for each?
EXISTS: The EXISTS function takes one parameter that is a SQL statement. If any records exist which match the criteria it returns true, or else it returns false. This provides you a clean, well-organized way to write a stored procedure in which does either an insert or update.
UNIQUE: If UNIQUE is particular then only unique values are used to compute the mean.
need a DBMS system on any data for assignment.
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Advantages of Data Distribution The primary benefit of distributed database systems is the ability to access and share data in a reliable and efficient manner.
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Explain in details about Data Sharing
(a) Why did SAP introduce the extended star schema?
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Ask question #Minim 100 words accepted#what is recovery management component in database management system and how it is useful
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