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thanks. Of course I am doing my homework myself always and this homework was made by ,yself too!!!:) It's just attemp how site is working as I am new here. Of course in all other my quetsions I will follow main rules and if I'd like to ask something from experts according my homework I will do it just in special events if some qeustions are are really very contradictory, I have doubts and I reallyneedhelp of experts to solve my problem.
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thanks. Of course I am doing my homework myself always and this homework was made by ,yself too!!!:) It's just attemp how site is working as I am new here. Of course in all other my quetsions I will follow main rules and if I'd like to ask something from experts according my homework I will do it just in special events if some qeustions are are really very contradictory, I have doubts and I reallyneedhelp of experts to solve my problem.

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In terms of the relations shown below, what is the appearance of the realtion RESULT after executing each of thesre instructions:<br />
X relation &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Y relation<br />
U V W &nbsp; &nbsp; RS &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br />
A Z 5 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;3 J<br />
B D 3 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;4 K<br />
C Q 5<br />
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RESULT &lt;- PROJECT W from X
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In terms of the relations shown below, what is the appearance of the realtion RESULT after executing each of thesre instructions:
X relation                          Y relation
U V W     RS                                
A Z 5                                3 J
B D 3                                4 K
C Q 5

RESULT <- PROJECT W from X

I have a question according to the relational model database

Databases are organized collections of data, most commonly accessed through management systems including schemas, tables, queries and processes that allow users to enter and manipulate the information or utilize it in other fashions, such as with web applications or for reporting purposes.

Databases

A contact manager in its most basic form is a software program that enables users to easily store and find contact information, such as names, addresses and telephone numbers. Sophisticated contact managers provide calendar sharing features and allow several people in a company to access the same database. Some contact management systems have evolved into customer relationship management (CRM) systems to analyze and plan for an organization’s interaction with current and future customers.