DCS evaluateWhereExpression

DCS_evaluateWhereExpression

Evaluate a WHERE expression. See also DCS evaluateWhereExpressions for faster evalution of multiple expressions.

Syntax

DCS_evaluateWhereExpression(whereExpression)

Arguments

• whereExpression: is string. ex: "selectColumn(Id) where true;"

Return value

Execute the where expression and return an object depending on where expression:

WhereExpression	Return type
average	empty
count	number
max	number
median	number
min	number
percentile	number
quantile	number
select	empty
selectColumn	array
stdev	number
sterr	number
sum	number
variance	number

Example

number dcsResourceId1 = DCS_getCurrentDcsResourceId();

number dcsResourceId2 = 123456;

string expression1 = "average(Single2) where true;";

string expression2 = "min(Single2) where true;";

DCS_use(dcsResourceId2);

print(DCS_evaluateWhereExpression(expression1)); //return average value of question Single2

print(DCS_evaluateWhereExpression(expression2)); //return minimum value of question Single2