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Oracle SQL and PL/SQL Handbook: A Guide for Data Administrators, Developers, and Business Analysts
book

Oracle SQL and PL/SQL Handbook: A Guide for Data Administrators, Developers, and Business Analysts

by John Adolph Palinski
August 2002
Intermediate to advanced content levelIntermediate to advanced
528 pages
10h 12m
English
Addison-Wesley Professional
Content preview from Oracle SQL and PL/SQL Handbook: A Guide for Data Administrators, Developers, and Business Analysts

The GROUPING Function

A problem with the ROLLUP and CUBE options is the difficulty in identifying the rows that are subtotals. One way to identify subtotal rows is to identify the rows that contain null values. Expressions that are subtotaled will have a value in the column that determines the ROLLUP. The other expressions will contain null values. However, if the database contains nulls, this technique will not work because Oracle will also roll up null value records. Oracle developed the GROUPING function to help the identification of ROLLUP records.

GROUPING functions accept only one parameter. The GROUPING function returns a value of 1 if the row is a subtotal row for the target expression. The function will return a value of 0 if the row ...

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Publisher Resources

ISBN: 0201752948Purchase book