EVERY

The EVERY function returns YES when every value of a Boolean expression is TRUE. It returns NO when any value of the expression is FALSE.

See also:

ANY, COUNT, and NONE

Return Value

BOOLEAN

Syntax

EVERY(boolean-expression [[STATUS] dimensions])

Arguments

boolean-expression

The Boolean expression whose values are to be evaluated.

STATUS

Can be specified when one or more of the dimensions of the result of the function are not dimensions of the Boolean expression. (See the description of the dimensions argument.) When you specify the STATUS keyword when this is not the case, Oracle OLAP produces an error.

In cases where one or more of the dimensions of the result of the function are not dimensions of the Boolean expression, the STATUS keyword might be required in order for Oracle OLAP to process the function successfully, or the STATUS keyword might provide a performance enhancement. See "The STATUS Keyword".

dimensions

The dimensions of the result. By default, EVERY returns a single value. When you indicate one or more dimensions for the results, EVERY tests for TRUE values along the dimensions that are specified and returns an array of values. Each dimension must be either a dimension of boolean-expression or related to one of its dimensions. When it is a related dimension, you can specify the name of the relation instead of the dimension name. This enables you to choose which relation is used when there is more than one.

Notes

NA Values

When the Boolean expression involves an NA value, EVERY returns a YES or NO result when it can, as shown in Table 11-1, "YES and NO Values Returned by EVERY When the Boolean Expression Includes an NA Value"

Table 11-1 YES and NO Values Returned by EVERY When the Boolean Expression Includes an NA Value

Boolean Expression	Result
`NA` EQ `NA`	`YES`
`NA` NE `NA`	`NO`
`NA` EQ non-`NA`	`NO`
`NA` NE non-`NA`	`YES`
`NA` AND `NO`	`NO`
`NA` OR `YES`	`YES`

However, in cases where a YES or NO result would be misleading, EVERY returns NA. For example, when you test whether an NA value is greater than a non-NA value, EVERY returns NA.

The Effect of NASKIP

EVERY is affected by the NASKIP option. When NASKIP is set to YES (the default), EVERY ignores NA values and returns YES when every value of the expression that is not NA is TRUE and returns NO when any values are not TRUE. When NASKIP is set to NO, EVERY returns NA when any value of the expression is NA. When all the values of the expression are NA, EVERY returns NA for either setting of NASKIP.

Data with a Time Dimension

When boolean-expression is dimensioned by dimension of type DAY, WEEK, MONTH, QUARTER, or YEAR, you can specify any other DAY, WEEK, MONTH, QUARTER, or YEAR dimension as a related dimension. Oracle OLAP uses the implicit relation between the dimensions. To control the mapping of one DAY, WEEK, MONTH, QUARTER, or YEAR dimension to another (for example, from weeks to months), you can define an explicit relation between the two dimensions and specify the name of the relation as the dimension argument to the EVERY function.

For each time period in the related dimension, Oracle OLAP tests the data values for all the source time periods that end in the target time period. This method is used regardless of which dimension has the more aggregate time periods.

The STATUS Keyword

When one or more of the dimensions of the result of the function are not dimensions of the Boolean expression, Oracle OLAP creates a temporary variable to use while processing the function. When you specify the STATUS keyword, Oracle OLAP uses the current status instead of the default status of the related dimensions for calculating the size of this temporary variable.

When the size of the temporary variable for the results of the function would exceed 2 gigabytes, you must specify the STATUS keyword in order for Oracle OLAP to execute the function successfully. When the dimensions of the Boolean expression are limited to a few values and are physically fragmented, you can specify the STATUS keyword to improve the performance of the function.

When you use EVERY with the STATUS keyword in an expression that requires going outside of the status for results (for example, with the LEAD or LAG functions or with a qualified data reference), the results outside of the status will be returned as NA.

Examples

Example 11-33 Testing for All-True Values by District

You can use the EVERY function to test whether each district's sales of sportswear have exceeded $50,000 in every month. To have the results dimensioned by district, specify district as the second argument to EVERY.

LIMIT product TO 'Sportswear'
REPORT HEADING 'Top Sales' EVERY(sales GT 50000, district)

The preceding statements produce the following output.

DISTRICT       Top Sales
-------------- ----------
Boston                 No
Atlanta               Yes
Chicago               Yes
Dallas                Yes
Denver                Yes
Seattle                NO

Example 11-34 Testing for All-True Values by Region

You might also want to find out the regions for which every district has sportswear sales that exceed $50,000 in every month. Since the region dimension is related to the district dimension, you can specify region instead of district as a dimension for the results of EVERY.

REPORT HEADING 'Top Sales' EVERY(sales GT 50000, region)

The preceding statement produces the following output.

REGION         Top Sales
-------------- ----------
East                   No
Central               Yes
West                   NO