Skip to main content

HAVING

HAVING( groupdataset, expression [, UNORDERED | ORDERED( bool ) ] [, STABLE | UNSTABLE ] [, PARALLEL [ ( numthreads ) ] ] [, ALGORITHM( name ) ] )

groupdatasetThe name of a GROUPed record set.
expressionThe logical expression by which to filter the groups.
UNORDEREDOptional. Specifies the output record order is not significant.
ORDEREDSpecifies the significance of the output record order.
boolWhen False, specifies the output record order is not significant. When True, specifies the default output record order.
STABLEOptional. Specifies the input record order is significant.
UNSTABLEOptional. Specifies the input record order is not significant.
PARALLELOptional. Try to evaluate this activity in parallel.
numthreadsOptional. Try to evaluate this activity using numthreads threads.
ALGORITHMOptional. Override the algorithm used for this activity.
nameThe algorithm to use for this activity. Must be from the list of supported algorithms for the SORT function's STABLE and UNSTABLE options.
Return:HAVING returns a GROUPed record set.

The HAVING function returns a GROUPed record set containing just those groups for which the expression is true. This is similar to the HAVING clause in SQL.

Example:

MyGroups := GROUP(SORT(Person,lastname),lastname);
     //group by last name
Filtered := HAVING(MyGroups,COUNT(ROWS(LEFT)) > 10);
     //filter out the small groups

See Also: GROUP