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Message Posted: Thu, 04 Dec 2003 @ 10:34:47 GMT


     
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Subj:   Primary Index
 
From:   Dennis Havez

Hie All,

Is someone knows what's happen if I compare a table with 15 attributs which will be Primary Index and Primary Key of the table (Ex1) and on the other hand a Table with 15 attributs with just 2 or 3 PI (which will be used for join other table) and a constraint Primary Key on the attributs (Ex2) ?

Ex1.

CREATE TABLE test
(
      id1   INTEGER,
      id2   INTEGER,
      id3   INTEGER,
...
      id13  INTEGER,
      id14  INTEGER,
      id15  INTEGER
)
UNIQUE PRIMARY INDEX (id1, id2, id3 ..., id13, id14, id15)

Ex2.

CREATE TABLE test
(
      id1   INTEGER,
      id2   INTEGER,
      id3   INTEGER,
...
      id13  INTEGER,
      id14  INTEGER,
      id15  INTEGER,
      PRIMARY KEY(id1, id2, id3 ..., id13, id14, id15)
)
UNIQUE PRIMARY INDEX (id1, id2, id3)

Do you know what is the best solution in the case where the table contient more 100 millions rows ?

That's a lot,

Denis



     
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