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#41
 
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Re: ?? Functional Dependency Question ?? -
10-18-2008
, 07:36 PM
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... Is there a difference between functional dependency and implication that I need to learn? |
for practitioners as long as they don't try to record negations, which
is be confusing anyway, at least for me. Always seemed more than
coincidence that the usual ascii fd notation was reminiscent of both
notions. I seem to recall wondering years ago why the db design IDE's
of the time, at least the ones I saw, didn't have a simple feature that
would let one validate fd's one had in mind. Seemed to me that most of
the time they wouldn't be affected by explosive execution times if they
emulated truth tables rather than try to cleverly compile axioms and
theorems. All very vague I know but the sun and the plonk are shining
here on the west coast. Hope it's not just the sulphites.
#42
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... Is there a difference between functional dependency and implication that I need to learn? |
for practitioners as long as they don't try to record negations, which
is be confusing anyway, at least for me. Always seemed more than
coincidence that the usual ascii fd notation was reminiscent of both
notions. I seem to recall wondering years ago why the db design IDE's
of the time, at least the ones I saw, didn't have a simple feature that
would let one validate fd's one had in mind. Seemed to me that most of
the time they wouldn't be affected by explosive execution times if they
emulated truth tables rather than try to cleverly compile axioms and
theorems. All very vague I know but the sun and the plonk are shining
here on the west coast. Hope it's not just the sulphites.
#43
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... Is there a difference between functional dependency and implication that I need to learn? |
for practitioners as long as they don't try to record negations, which
is be confusing anyway, at least for me. Always seemed more than
coincidence that the usual ascii fd notation was reminiscent of both
notions. I seem to recall wondering years ago why the db design IDE's
of the time, at least the ones I saw, didn't have a simple feature that
would let one validate fd's one had in mind. Seemed to me that most of
the time they wouldn't be affected by explosive execution times if they
emulated truth tables rather than try to cleverly compile axioms and
theorems. All very vague I know but the sun and the plonk are shining
here on the west coast. Hope it's not just the sulphites.
#44
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... Is there a difference between functional dependency and implication that I need to learn? |
for practitioners as long as they don't try to record negations, which
is be confusing anyway, at least for me. Always seemed more than
coincidence that the usual ascii fd notation was reminiscent of both
notions. I seem to recall wondering years ago why the db design IDE's
of the time, at least the ones I saw, didn't have a simple feature that
would let one validate fd's one had in mind. Seemed to me that most of
the time they wouldn't be affected by explosive execution times if they
emulated truth tables rather than try to cleverly compile axioms and
theorems. All very vague I know but the sun and the plonk are shining
here on the west coast. Hope it's not just the sulphites.
#45
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... Is there a difference between functional dependency and implication that I need to learn? |
for practitioners as long as they don't try to record negations, which
is be confusing anyway, at least for me. Always seemed more than
coincidence that the usual ascii fd notation was reminiscent of both
notions. I seem to recall wondering years ago why the db design IDE's
of the time, at least the ones I saw, didn't have a simple feature that
would let one validate fd's one had in mind. Seemed to me that most of
the time they wouldn't be affected by explosive execution times if they
emulated truth tables rather than try to cleverly compile axioms and
theorems. All very vague I know but the sun and the plonk are shining
here on the west coast. Hope it's not just the sulphites.
#46
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... Is there a difference between functional dependency and implication that I need to learn? |
for practitioners as long as they don't try to record negations, which
is be confusing anyway, at least for me. Always seemed more than
coincidence that the usual ascii fd notation was reminiscent of both
notions. I seem to recall wondering years ago why the db design IDE's
of the time, at least the ones I saw, didn't have a simple feature that
would let one validate fd's one had in mind. Seemed to me that most of
the time they wouldn't be affected by explosive execution times if they
emulated truth tables rather than try to cleverly compile axioms and
theorems. All very vague I know but the sun and the plonk are shining
here on the west coast. Hope it's not just the sulphites.
#47
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#48
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#49
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#50
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