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 Message Boards » » database help re:relational algebra queries Page [1]  
wut
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Question:
Give the department number of the department that controls the reorganization project.

p=pi
s=sigma

I have this so far:
RA: (s number=______ (p number (Department)))*(s name=reorganization (p name (Project)))

Is this correct? Im not sure how the name relates to the number unless Im completely over thinking this and it should be like this:

RA: (s number=______ (p number, name (Department)))*(s name=reorganization (p name (Project)))


Anyone know?

In fact I dont even know if I have the syntax completely correct. I am teaching myself this stuff and its a little frustrating.

[Edited on December 5, 2008 at 6:42 PM. Reason : .]

12/5/2008 6:40:57 PM

amac884
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5

12/15/2008 7:18:08 PM

amac884
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check that...i reworked my formulas and got 4

1/10/2009 12:39:59 AM

Talage
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^ Haha, a month later?

Wait another month and I can give some input since we'll probably have covered this in my database class by then.

1/10/2009 1:40:14 AM

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