Computers and Technology, 12.04.2021 21:10, EBeast9741
For the following queries, determine the minimum cost of the query (in I/Os), if you can have any number of secondary (also known as alternative-2) indexes available. Each index has to be on a single key attribute; composite keys are not allowed. a) select count(*) from employees where name = ‘John Smith’; b) select avg(salary) from employees where name = ‘John Smith’; c) select count(*) from employees where birthdate < ‘1-1-1980 00:00’;
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Computers and Technology, 23.06.2019 20:00, emmaraeschool
Me ajude por favor , coloquei uma senha e não consigo tira-la no chorme
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Computers and Technology, 24.06.2019 08:30, trashellyoung
Why might you choose to create a functional resume
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Computers and Technology, 24.06.2019 09:00, king514
Technician a says that a new replacement part is always good. technician b says that sometimes recent repair work will be the cause of a complaint. who is correct? a. both technicians a and b b. technician a c. technician b d. neither technician a nor b
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For the following queries, determine the minimum cost of the query (in I/Os), if you can have any nu...
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