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DATE 2014-12-01

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MESSAGE
DATE 2014-12-11
FROM Ruben
SUBJECT Re: [LIU Comp Sci] Database Class concepts which are still unclear
From owner-learn-outgoing-at-mrbrklyn.com Thu Dec 11 12:57:41 2014
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Message-ID: <5489DB18.9000909-at-my.liu.edu>
Date: Thu, 11 Dec 2014 12:57:44 -0500
From: Ruben
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To: learn-at-mrbrklyn.com, learn-at-nylxs.com,
Ping-Tsai Chung
Subject: Re: [LIU Comp Sci] Database Class concepts which are still unclear
References: <5489C062.7010909-at-panix.com>
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Does anyone understand this. The way this is written it is not
comprehendable. The text doesn't flow logically and example, which in
theory is supposed to explain what the text does not, not not explain it
which leave this and "magic logic" - And Blood of a Nwet and Poof, you
get the desired chicken!

<<6.3.4 The DIVISION Operation
The DIVISION operation, denoted by ÷, is useful for a special kind of
query that
sometimes occurs in database applications.>>


Really? What kind?

<< An example is Retrieve the names of employees who work on all the
projects that ‘John Smith’ works on. >>


What class of query is this called and how is it generlized mathmatically.


<>

OK - we will learn by exmple since we have no definitions

<in the intermediate relation
SMITH_PNOS:>>

OK

<SMITH_PNOS ? ?Pno(WORKS_ONEssn=SsnSMITH)>>

OK - that makes sense

<< Next, create a relation that includes a tuple whenever
the employee
whose Ssn is Essn works on the project whose number is Pno in the
intermediate
relation SSN_PNOS:>>

That is a lot of words that make NO SENSE. This sentence doesn't parse
English Gammar in a way that is meaningful, which is interesting since
this is a chapter on Relational Algrabra for which Grammar is a specific
subset and application of.

In other words, I don't think the auther knows what he wrote here and
his editor didn't know enough to fix it or clarify it. But we have an
example:

<>

Fine this MEANS project all the tuples in WORKS_ON by restricting them
to the attributes of Essn and Pno and assign it to a relationship we
call SSN_PNOS

<gives the desired
employees’ Social Security numbers:>>

PRESTO!!! Use this magic symbol and get your desired result!

<>

I have no idea what this does and it hasn't been explained. It is a
waste of my time.

<>

And this says take a natural join of SSNS and EMPLOYEE and project just
the names.

Now dissect the example more closely. Maybe "Presto" will show itself
and a logical contruction.







SSN_PNOS

Essn Pno

123456789 1

123456789 2

666884444 3

453453453 1

453453453 2

333445555 2

333445555 3

333445555 10

333445555 20

999887777 30

999887777 10

987987987 10

987987987 30

987654321 30

987654321 20

888665555 20


SMITH_PNOS
Pno
1
2

SSNS
Ssn
123456789
453453453



Magic Results, no explanation. This is the kind of soft material that
litters this class everywhere. I don't understand it and until you can
explain it, I'm not convinced you understand it either.


On 12/11/2014 11:03 AM, Ruben Safir wrote:
> 6.2.2 The CARTESIAN PRODUCT (CROSS PRODUCT)
> Operation
> Next, we discuss the CARTESIAN PRODUCT operation—also known as CROSS
> PRODUCT or CROSS JOIN—which is denoted by ×. This is also a binary set
> opera-
> tion, but the relations on which it is applied do not have to be union
> compatible. In
> its binary form, this set operation produces a new element by combining
> every
> member (tuple) from one relation (set) with every member (tuple) from
> the other
> relation (set). In general, the result of R(A1, A2, ..., An) × S(B1, B2,
> ..., Bm) is a rela-
> tion Q with degree n + m attributes Q(A1, A2, ..., An, B1, B2, ..., Bm),
> in that order.
> The resulting relation Q has one tuple for each combination of
> tuples—one from R
> and one from S. Hence, if R has nR tuples (denoted as |R| = nR), and S
> has nS tuples,
> then R × S will have nR * nS tuples.
> The n-ary CARTESIAN PRODUCT operation is an extension of the above concept,
> which produces new tuples by concatenating all possible combinations of
> tuples
> from n underlying relations.
>
>
> What is an n-ary operation? It is mentioned several times, but I don't
> see an answer
>
> Ruben
>

  1. 2014-12-02 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Arch Study tonight
  2. 2014-12-02 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Memory Notes et al
  3. 2014-12-02 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Re: Sorry for the last reply
  4. 2014-12-06 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] All the notes through External Memory
  5. 2014-12-06 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Parity Bit Algebra
  6. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  7. 2014-12-06 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Parity Bit Algebra
  8. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  9. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  10. 2014-12-06 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Parity Bit Algebra
  11. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  12. 2014-12-06 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Parity Bit Algebra
  13. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  14. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  15. 2014-12-06 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Parity Bit Algebra
  16. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  17. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  18. 2014-12-06 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Parity Bit Algebra
  19. 2014-12-06 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Parity Bit Algebra
  20. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  21. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Parity Bit Algebra
  22. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] All the notes through External Memory
  23. 2014-12-06 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Parity Bit Algebra
  24. 2014-12-07 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Computer Available
  25. 2014-12-07 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Computer Available
  26. 2014-12-07 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Computer Available
  27. 2014-12-07 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] Upcoming Events for Oracle Professionals
  28. 2014-12-08 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Memorize Optcode
  29. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Memorize Optcode
  30. 2014-12-08 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Memorize Optcode
  31. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Memorize Optcode
  32. 2014-12-08 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Memorize Optcode
  33. 2014-12-08 Kamran <kamran.mirzayev-at-my.liu.edu> Re: [LIU Comp Sci] Memorize Optcode
  34. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Memorize Optcode
  35. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Memorize Optcode
  36. 2014-12-08 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Memorize Optcode
  37. 2014-12-08 Ruben <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Memorize Optcode
  38. 2014-12-08 Ruben <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Memorize Optcode
  39. 2014-12-08 Ruben <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Memorize Optcode
  40. 2014-12-08 Kamran <kamran.mirzayev-at-my.liu.edu> Re: [LIU Comp Sci] Memorize Optcode
  41. 2014-12-08 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] UPerclassmen
  42. 2014-12-08 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] UPerclassmen
  43. 2014-12-08 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] UPerclassmen
  44. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] UPerclassmen
  45. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Arch Problem Solution for the final HW question
  46. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Foundation for OPTCODE and Machine Instruction
  47. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Memorize Optcode
  48. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Notes Done on In and Out, Operating Systemsm Modules and Memoery
  49. 2014-12-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] UPerclassmen
  50. 2014-12-09 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Anyone in school
  51. 2014-12-09 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] CPU Instructions - Notes for Chapter 14
  52. 2014-12-09 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Machine Instructions notes
  53. 2014-12-09 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Relative - PC addressing
  54. 2014-12-09 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] wifi
  55. 2014-12-10 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Answers to the final review questions
  56. 2014-12-10 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] database Hoem Work
  57. 2014-12-10 duodujames <duodujames-at-gmail.com> RE: [LIU Comp Sci] noone in class?
  58. 2014-12-10 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] UPerclassmen
  59. 2014-12-10 Maneesh Kongara <maneeshkongara-at-gmail.com> Subject: [LIU Comp Sci] Answers to the final review questions
  60. 2014-12-10 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] database Hoem Work
  61. 2014-12-10 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Fwd: MINIPROJECT
  62. 2014-12-10 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] HW 6
  63. 2014-12-10 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] MINIPROJECT
  64. 2014-12-10 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] noone in class?
  65. 2014-12-10 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] welcome jame
  66. 2014-12-10 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: HW Last one maybe 6?]
  67. 2014-12-11 Ruben Safir <mrbrklyn-at-panix.com> Fwd: Re: [LIU Comp Sci] Database Class concepts which are still unclear
  68. 2014-12-11 Ruben Safir <mrbrklyn-at-panix.com> Re: Fwd: Re: [LIU Comp Sci] Database Class concepts which are still
  69. 2014-12-11 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Database Class concepts which are still unclear
  70. 2014-12-11 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Database Class concepts which are still unclear
  71. 2014-12-11 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Database Class concepts which are still unclear
  72. 2014-12-11 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Database Class concepts which are still unclear
  73. 2014-12-11 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Invitation: Flatiron Alumni Present!
  74. 2014-12-11 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Re: Database Class concepts which are still unclear
  75. 2014-12-11 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: turning attibute values into relations?
  76. 2014-12-11 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] jobs
  77. 2014-12-12 James Kwabena Duodu <duodujames-at-gmail.com> Re: [LIU Comp Sci] Answers to the final review questions
  78. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] .NET and C# free implimentation
  79. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Calling Upper Classman
  80. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Re: n-ary operations
  81. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Re: Oracle XE Web Server
  82. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Re: relational algrabra division?
  83. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] jobs
  84. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] lerning tools
  85. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] liu mailing list
  86. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Re: turning attibute values into relations?
  87. 2014-12-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Sunday Arch Finals Review Study Session
  88. 2014-12-13 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Answers to the final review questions
  89. 2014-12-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Re: relational algrabra division?
  90. 2014-12-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Base Conversations
  91. 2014-12-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Gates HW problems
  92. 2014-12-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Logic Gates
  93. 2014-12-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] old homework question
  94. 2014-12-14 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Answers to the final review questions
  95. 2014-12-14 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] NOTE ERROR:****Error in the Hamming notes on the final review
  96. 2014-12-15 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Answers to the final review questions
  97. 2014-12-15 Kamran <kamran.mirzayev-at-my.liu.edu> Re: [LIU Comp Sci] study hall today
  98. 2014-12-15 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] study hall today
  99. 2014-12-15 Kamran <kamran.mirzayev-at-my.liu.edu> Re: [LIU Comp Sci] study hall today
  100. 2014-12-15 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] study hall today
  101. 2014-12-15 Kamran <kamran.mirzayev-at-my.liu.edu> Re: [LIU Comp Sci] study hall today
  102. 2014-12-15 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] study hall today
  103. 2014-12-15 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] study hall today
  104. 2014-12-15 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] study hall today
  105. 2014-12-15 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] study hall today
  106. 2014-12-15 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] study hall today
  107. 2014-12-15 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] study hall today
  108. 2014-12-15 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] errror in the hamming notes.
  109. 2014-12-15 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [Samir.Iabbassen-at-liu.edu: RE: NOTE ERROR:****Error in the Hamming
  110. 2014-12-16 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Study Hall
  111. 2014-12-16 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Study Hall
  112. 2014-12-16 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: HW Last one maybe 6?]
  113. 2014-12-17 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] database class
  114. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] database class
  115. 2014-12-17 James Kwabena Duodu <duodujames-at-gmail.com> Re: [LIU Comp Sci] database class
  116. 2014-12-17 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] database class
  117. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] database class
  118. 2014-12-17 duodujames <duodujames-at-gmail.com> Re: [LIU Comp Sci] database class
  119. 2014-12-17 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] database class
  120. 2014-12-17 James Kwabena Duodu <duodujames-at-gmail.com> Re: [LIU Comp Sci] database class
  121. 2014-12-17 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] database class
  122. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] database class
  123. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] database class
  124. 2014-12-17 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] database class
  125. 2014-12-17 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] study hall today
  126. 2014-12-17 Kamran <kamran.mirzayev-at-my.liu.edu> Re: [LIU Comp Sci] study hall today
  127. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] why is this textbook just off the look
  128. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] why is this textbook just off the look
  129. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] database class
  130. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Database HW6
  131. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] the silence
  132. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Traffic Lights Diagram
  133. 2014-12-17 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] why is this textbook just off the look
  134. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] in coming
  135. 2014-12-18 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Need tutoring on Relational Calculus
  136. 2014-12-18 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Need tutoring on Relational Calculus
  137. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Need tutoring on Relational Calculus
  138. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Need tutoring on Relational Calculus
  139. 2014-12-18 Sergei Glikstein <serge.gl-at-gmail.com> Re: [LIU Comp Sci] Normalization review
  140. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  141. 2014-12-18 Sergei Glikstein <serge.gl-at-gmail.com> Re: [LIU Comp Sci] Normalization review
  142. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  143. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  144. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  145. 2014-12-18 maneeshkongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Normalization review
  146. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  147. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  148. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  149. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  150. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  151. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  152. 2014-12-18 Sergei Glikstein <serge.gl-at-gmail.com> Re: [LIU Comp Sci] Normalization review
  153. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  154. 2014-12-18 From: <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  155. 2014-12-18 Sergei Glikstein <serge.gl-at-gmail.com> Re: [LIU Comp Sci] Normalization review
  156. 2014-12-18 From: <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Normalization review
  157. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] BCNF
  158. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] in coming
  159. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] lunch
  160. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Need tutoring on Relational Calculus
  161. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Normalization review
  162. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Re: relational calculus
  163. 2014-12-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] relational calculus
  164. 2014-12-19 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Oracle Files for the Homework and Oracle Resources
  165. 2014-12-22 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Operating Systems Class
  166. 2014-12-30 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Creating a New OS: Final Projects for MS degree

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