Viewing 15 posts - 4,366 through 4,380 (of 14,953 total)
Steven993 (4/27/2011)
You don't know what is a relation.You can't see the difference between relation and table......
Yes, I do know these things. You don't know debate, logic, or how to...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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April 27, 2011 at 12:12 pm
Richard Warr (4/27/2011)
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 12:08 pm
Steven993 (4/27/2011)
David Burrows (4/27/2011)
Your example shows violation of Codd's 1NF and is what I understood to be 1NF.
My example, you mean AddressLine table ? It's is not a 1NF violation..
David...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 11:52 am
David Portas (4/27/2011)
GSquared (4/27/2011)
Whom have I insulted and when?
You think that people aren't going to be insulted when you say they are "psychotic" if they hold a particular point of...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 11:45 am
Steven993 (4/27/2011)
GSquared (4/27/2011)
This particular data has an order to the tuples:alien:
Would you be happy if I'd put quotes around the word "tuples", implying that, in this case, these "rows"...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 9:33 am
As for "all relations are by definition in 1NF", honestly, all orthodox relations are, by definition, in at least 5NF. Otherwise, they aren't proper relations, now are they?
It's circular...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 9:30 am
David Portas (4/27/2011)
GSquared (4/27/2011)
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 9:27 am
I've had to use this kind of table before, and something I've found valuable is a column that indicates which kind of data a given row will hold. You...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 9:23 am
Below a threshhold number of rows in a table, the query optimizer doesn't even check for indexes, it just scans the table. Figuring out which index to use would...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 9:21 am
Steven993 (4/27/2011)
You have never read 1NF definition or even the Relation definition.
Example of 1NF definition, from the only book I have right now :
Database Systems - The complete Book Second...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 9:14 am
David Portas (4/27/2011)
GSquared (4/27/2011)
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 9:09 am
I'm saving mine up so I can get either the secret decoder ring, or the "run faster" button for my code. I'm not sure which yet.
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 8:29 am
The original requirement was if there's more than one row, do X. If Exists will test if there is at least one row. Are you sure that's what's...
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 7:31 am
You're welcome.
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
Property of The Thread
"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 7:29 am
David Portas (4/26/2011)
GSquared (4/26/2011)
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
Property of The Thread
"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
April 27, 2011 at 7:01 am
Viewing 15 posts - 4,366 through 4,380 (of 14,953 total)