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Repeat Exercise 16.3.3, but allow the sub query to be corollated with R. For simplicity, you may assume that the subquery has the simple form of select-from-where expression described in this section, with no further subqueries.
Exercise 16.3.3
Give a rule for converting each of the following forms of to relational algebra. All conditions may be assumed to be applied (by a two-argument selection) to a relation R. You may assume that thesubquery is not correlated with R. Be careful that you do not introduce or eliminate duplicates in opposition to the formal definition of SQL.
a) A condition of the form EXISTS ().
b) A condition of the form a - ANY , where a is an attribute of R.
c) A condition of the form a - ALL , where a is an attribute of R.
Describe how you would convince a coworker to better manage a personal copmuter by performing regular backups and keep the system patches current?
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Create a new file called TestWork.scr Change the permissions on this new file to add the execute bit for user, group, and owner.
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Assume that when the JMPC field in the microinstruction is enabled (set), MBR is ORed with NEXT_ADDRESS to determine the address of the next microinstruction to be executed
Your company has been hired to design a product that will provide searches of textual documents and database querying. Your design team has not developed a product like this before. Examine the challenges associated with searching in textual docum..
When the size of the array is greater than 20 and the number of entries in the list is less than half the size of the array, reduce the size of the array so that it is three quarters of its current size.
Develop a virtualization adoption plan applicable to the scenario by doing the following:1. Explain how the benefits of virtualization would impact the city of Seabreeze.
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