Question 36 :
What are the disadvantages of clusters ?
The time for Insert increases.
Question 37 :
Can Long/Long RAW be clustered ?
Question 38 :
Can null keys be entered in cluster index, normal index ?
Question 39 :
Can Check constraint be used for self referential integrity ? How ?
Yes. In the CHECK condition for a column of a table, we can reference some other column of the same table and thus enforce self referential integrity.
Question 40 :
What are the min. extents allocated to a rollback extent ?