MAX(recordset, value [, KEYED ] [, UNORDERED | ORDERED( bool ) ] [, STABLE | UNSTABLE ] [, PARALLEL [ ( numthreads ) ] ] [, ALGORITHM( name ) ] )


recordsetThe set of records to process. This may be the name of a dataset or a record set derived from some filter condition, or any expression that results in a derived record set. This also may be the keyword GROUP to indicate finding the maximum value of the field in a group, when used in a RECORD structure to generate crosstab statistics.
valueThe expression to find the maximum value of.
KEYEDOptional. Specifies the activity is part of an index read operation, which allows the optimizer to generate optimal code for the operation.
valuelistA comma-delimited list of expressions to find the maximum value of. This may also be a SET of values.
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:MAX returns a single value.

The MAX function either returns the maximum value from the specified recordset or the valuelist. It is defined to return zero if the recordset is empty.


MaxVal2 := MAX(4,8,16,2,1); 
SetVals := [4,8,16,2,1];
MaxVal3 := MAX(SetVals); 

OUTPUT(MaxVal2); //returns 16
OUTPUT(MaxVal3); //returns 16

//example using a DATASET
SalesRecord := RECORD
  INTEGER OrderNumber;
  INTEGER SaleAmount;
Sales := DATASET([{923,1001},
                  {931,113}], SalesRecord);

OUTPUT(MAX(Sales,Sales.SaleAmount)); //returns 9999

See Also: MIN, AVE