In which scenario would index be most useful? () A. The indexed column is declared as NOT NULL.B. The indexed columns are used in the FROM clause.C. The indexed columns are part of an expression.D. The indexed column contains a wide range of values.
In which scenario would index be most useful? ()
A. The indexed column is declared as NOT NULL.
B. The indexed columns are used in the FROM clause.
C. The indexed columns are part of an expression.
D. The indexed column contains a wide range of values.
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