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comparison of oracle RDBMS with MySQL
A well-maintained relational DBMS has a high level of data integrity. What features of a relational DBMS contribute towards this level of integrity? Relational DBMS gives high
explain normalisation
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
List the table modification commands in SQL? A) Deletion B) Updates C) Insertion D) Update of a view
Candidate Key: In a relation R, a candidate key for R is a subset of the set of attributes of R, which have the differnt two properties: (1) Uniqueness: N
Have database built but having problems with some questions that go with the database
Explain CNT in the respects of QBE ? CNT: It is one of the aggregation commands given in QBE. It is used to identify number of tuples
Define Signal. It allows methods to respond to events triggered by themselves or by other processes. Each signal corresponds to an exacting event. A signal is represented in Sy
Using a database design approach of your choice, produce a logical design for Pharma. 1) Your answer must consist of ONE the following: An entity-relationship (ER) diagra
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