year order quantity ger nos.
year
order
quantity
ger nos .
number
number
list length list_number list_minimum list_maximum
number text number <c,numberspan>
1893 n31 1 999
what amount of time to the years span ?
WDT NN IN NN TO DT NNS NN .
5 years
select max ( c1_number ) - min ( c1_number ) from w