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Database System Fundamentals

   

Added on  2019-09-18

1 Pages151 Words308 Views
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1. True.2. True3. The global database system catalog is logical description of whole database, if it is not in disrupted form. It contains the definition of entities that are the tables in database, relationship among the table along with its type, constraints and security. The function of global database system is that it provides the physical data independence from the distributed environment and it also provides the logical data independence. 4. Splitting a large heavily heavily used table across devices on separate physical disks will improve the efficiency because when all the tables on the same disk it will take time to scan whole database one by one but whenthey are separated on the different disks system will search the data on all the disks simultaneously and produce the result in minimum time.5. True
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