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Oracle in a Nutshell
book

Oracle in a Nutshell

by Rick Greenwald, David C. Kreines
December 2002
Intermediate to advanced content levelIntermediate to advanced
928 pages
85h 29m
English
O'Reilly Media, Inc.
Content preview from Oracle in a Nutshell

DENSE_RANK

Aggregate syntax:

DENSE_RANK (expr[,expr...]) WITHIN GROUP 
        (ORDER BY expr [ASC | DESC][NULLS {FIRST | LAST}]
                [, expr [ASC | DESC] [NULLS {FIRST | LAST}]...])

Analytic syntax:

DENSE_RANK (  ) OVER (analytic_clause)

Computes the dense rank position of that row among all rows of the aggregation group for a hypothetical row identified by the arguments to the function and the ORDER BY specification. The value returned is an integer > = 1, and the highest possible value is the number of unique values returned by the query. All arguments to this function must evaluate to a constant expression. Expressions in the main function must match the positions of those in the ORDER BY clause. Parameters are the same as for CUME_DIST

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Publisher Resources

ISBN: 0596003366Errata Page