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coolerbob
Aged Yak Warrior
841 Posts |
 Posted - 2008-08-21 : 03:45:58
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| I was reading this http://en.wikipedia.org/wiki/Offset_(computer_science)I know it's a well used concept. But I'm not quite sure on what it's practical value is. Even in a SQL data page, offsets get used. How does it help with anything? |
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spirit1
Cybernetic Yak Master
11752 Posts |
Posted - 2008-08-21 : 04:29:32
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| well roughly a page in sql server 2005 first has static length datatypes then variable length datatypes stored.you can think of this as an array A[8000]. now the offset tells you on which index the correct data column starts.so for example if you have 2 columns char(6) and bitthe offsets would be 0 and 6A[0] to A[5] is char while A[6] is bitany clearer?_______________________________________________Causing trouble since 1980Blog: http://weblogs.sqlteam.com/mladenpSpeed up SSMS development: www.ssmstoolspack.com <- version 1.0 out! |
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coolerbob
Aged Yak Warrior
841 Posts |
Posted - 2008-08-21 : 18:42:44
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| So it gets used as a shortcut basically? |
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Use of Offset