
DeepSee MDX Reference
Numeric Expressions



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This section describes how to create and use numeric expressions
in DeepSee MDX.
In DeepSee MDX, a numeric expression can have any of the following
forms:

A numeric literal. For example:
37
The literal cannot start with a decimal point; that
is, you must include a leading 0 with any fractional values. For example,
0.1 is valid is valid, but
.1 is not
valid.

A percentage literal. For example:
10%
There must be no space between the number and the percent
sign.


Many MDX functions return numeric values,
including
AVG,
MAX,
COUNT, and others. Also, the
IIF function
can return numeric values; this function evaluates a condition and
returns one of two values, depending on the condition.

An expression that uses mathematical operators to
combine numeric expressions. For example:
MEASURES.[%COUNT]
/ 100
DeepSee supports the standard mathematical
operators:
+ (addition),
 (subtraction),
/ (division), and
* (multiplication).
It also supports the standard unary operators:
+ (positive) and
 (negative).
You can use parentheses to control precedence.
In the expression, if any value is null, the expression evaluates
to null.
If you divide a value by 0, DeepSee treats the result as null.
Tip:
The MDX function
IIF can be
useful in such expressions.

Note that the value of a member expression depends upon the measure
that is currently in use. By default, this expression evaluates to
the number of records that belong this member. In contrast, if a specific
measure is in use, this expression evaluates to the aggregate value
of that measure across those records.

The MDX identifier for a dimension, such as
[gend]
Note that the value of this expression
depends upon the measure that is currently in use. By default, this
expression evaluates to the number of records in the cube. In contrast,
if a specific measure is in use, this expression evaluates to the
aggregate value of that measure across all records in the cube.

A reference to a pivot variable that contains a numeric
value. To refer to a pivot variable, use the following syntax:
Where
variablename is the logical
variable name. Do not enclose this expression with square brackets.
This syntax is not casesensitive; nor is the pivot variable name.
You can use numeric expressions in the following ways:

As a numeric argument to many MDX functions. For example:
AVG(diagd.MEMBERS, MEASURES.[%COUNT])


This section shows examples of some of the less common kinds
of numeric expressions. The first example shows that a member expression
has a numeric value:
SELECT gend.h1.gender.female ON 0 FROM patients
Female
526
The next example is a variation of the preceding:
SELECT gend.h1.gender.female+100 ON 0 FROM patients
Expression
626
As noted earlier, the value of a member expression depends upon
the measure that is in use:
SELECT gend.h1.gender.female ON 0 FROM patients WHERE MEASURES.[avg age]
Female
37.23
SELECT gend.h1.gender.female+500 ON 0 FROM patients WHERE MEASURES.[avg age]
Expression
537.23
The next example shows the numeric value of a dimension:
SELECT allerd ON 0 FROM patients
1,000
As noted earlier, the value of such an expression depends upon
the measure that is in use:
SELECT allerd ON 0 FROM patients WHERE MEASURES.[avg allergy count]
0.99