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Home -> Community -> Mailing Lists -> Oracle-L -> Index question ???
Hi all,
According to Oracle's doc, for a table > 1000 rows, if the query returns < 4% of the data, an index can be built.
If I have a table, with ID 1,2, 3 return < 4% of the row, but ID 4, 5, 6 returns > 4% rows. Should I build an index on ID column?
Also you know any general guildlines for building, not building indexes? OEM generates suggestions too, should I follow?
Thanks you!
Janet
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