AVERAGE

AVERAGE, AVG

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The AVERAGE field qualifier keyword causes a field to be reported together with its mean average value. The synonym AVG may be used.

 

 

Format

 

AVERAGE field {field.qualifiers} {NO.NULLS}

 

where

 

fieldis the field or evaluated expression to be displayed.

 

field.qualifiers are other field qualifying keywords

 

NO.NULLScauses null values to be ignored.

 

 

The AVERAGE field qualifier keyword is placed before the field name to which it applies and causes the query processor to report the value of the field for each record processed and also to report the mean average value at the end of the report. Used with breakpoints, the AVERAGE keyword will also report the average value of the field at each breakpoint.

 

If the field is defined as multivalued, the AVERAGE keyword operates on each value in turn.

 

The AVERAGE keyword operates only on numeric data. Non-numeric values are ignored except that the default behaviour is to treat null items as zero. The NO.NULLS keyword can be used to prevent null values being included in the calculation of the average value.

 

 

Example

 

The sentence

 

LIST INVOICES AVERAGE VALUE CUSTOMER.NAME WITH NO AMT.PAID

 

would produce a display such as that below in which the average value of the VALUE field is included at the end of the report.

 

LIST INVOICES AVERAGE VALUE CUSTOMER.NAME WITH NO AMT.PAID

Invoice  ...Value  Customer...................

74529    £1712.43  J McTavish

74273      £95.23  County Newspapers

63940     £141.00  R Bryant

74993       £9.29  Write Right Stationery

        ========

         £489.49

4 records listed.

 

 

See also:

MEDIAN, MODE, RANGE