IIF (MDX)
Returned Type
This function returns a number or a string, depending on the arguments used and the value of the logical expression.
Syntax and Details
IIF(check_expression, expression1, expression2)
-
expression1 and expression2 are numeric or string expressions. They do not have to be the same type.
InterSystems MDX does not support other types of arguments.
To compare to a null value, use the ISNULL function instead.
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check_expression is a logical expression, typically that compares a measure or a property to a constant.
If check_expression is true, the function returns the value given by expression1. Otherwise, it returns the value given by expression2.
Example
For example:
SELECT IIF(MEASURES.[%COUNT]<500, "fewer than 500", "500 or more") ON 0, diagd.MEMBERS ON 1 FROM patients
IIF
1 None 500 or more
2 asthma 500 or more
3 CHD fewer than 500
4 diabetes 500 or more
5 osteoporosis fewer than 500
As a variation, the following query uses %LABEL to apply a suitable caption to the data column:
SELECT %LABEL(IIF(MEASURES.[%COUNT]<500, "fewer than 500", "500 or more"),"Patient Count") ON 0,
diagd.MEMBERS ON 1 FROM patients
Patient Count
1 None 500 or more
2 asthma 500 or more
3 CHD fewer than 500
4 diabetes 500 or more
5 osteoporosis fewer than 500
For another example, the following query uses the value of a property:
SELECT %LABEL(IIF(homed.h1.CURRENTMEMBER.PROPERTIES("Population")>20000,"big","small"),
"Town Size") ON 0,
homed.city.MEMBERS ON 1 FROM patients
Town Size
1 Cedar Falls big
2 Centerville big
3 Cypress small
4 Elm Heights big
5 Juniper small
6 Magnolia small
7 Pine small
8 Redwood big
9 Spruce small
The following example examines the name of the member and conditionally suppresses display of a measure:
WITH MEMBER MEASURES.iif AS 'IIF(homed.CURRENTMEMBER.PROPERTIES("name")="Pine"," ",
MEASURES.[%COUNT])' SELECT MEASURES.iif ON 0, homed.city.MEMBERS ON 1 FROM patients
iif
1 Cedar Falls 1,120
2 Centerville 1,106
3 Cypress 1,139
4 Elm Heights 1,078
5 Juniper 1,109
6 Magnolia 1,122
7 Pine
8 Redwood 1,128
9 Spruce 1,108
