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SELECT orders.order_date, orders.customer_numbFROM orders INNER JOIN order_lines ON orders.order_numb = order_lines.order_numbWHERE order_lines.isbn = '0-131-4966-9';
and here it is rewritten using a subquery:
SELECT order_date, customer_numbFROM ordersWHERE order_numb IN (SELECT order_numbFROM order_linesWHERE isbn = '0-131-4966-9')
Assume that the tables orders and order_lines each have 500,000 rows/tuples.
Assume (somewhat artificially) that RAM can hold 200 rows and devotes half of that to reading one table and half to reading the other table and has "other places" to store the subquery/query results.
(i) How many reads from the hard drive will the original query take?
(ii) How many reads from the hard drive would the rewritten query take?
Describe protocols at the different layers of the OSI model and explain their functionality
Considering this information, explain good strategies for placing files with the following kinds of access patterns Frequent, random accesses to a small file (e.g., catalog relations).
One way to do (static) linking is as follows. Before scanning the library, the linker builds a list of procedures needed. Can a register be used as the actual parameter in a macro call? How about a constant? Why or why not?
A procedure is said to be I/O bound if it needs a lot of I/O operations, whereas a procedure that consists of mostly computations within the CPU/memory system is said to be compute bound.
1. Show the steps to create a variable called NICKNAME which has a nickname for you in it; make this variable available to the environment
originally the sap erp software was developed for and implemented by mostly manufacturing companies in the beginning.
Show the scheduling order of the processes using a Gantt chart and what is the turnaround time for each process?
Now that you have a program design and a selected programming language for your assignment, you can start looking at the logical flow of the processes within your program and the data that is input,
Using the material you learned in this topic, create instructions that can show a new Windows 7 and Office 2010 user at least three different ways to open a program in Microsoft Windows
For the circuit below, what is the voltage across R(load) if the Maximum Power Transfer Theorem determines the value of R(load)?
Discuss the merits of each file management system - Methods available for file manipulation and how user-defined permissions are implemented and can be examined.
assessment of ability of the ultimate users of the system to accept the system and incorporate it into the ongoing operations of the organization
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