Question : max of date

I have a table [qdfdata] with data :
[glassmodelid] [variant] [from] [to]

the from and to dates are date property in the table.

GlassModelID      GlassQualID      Description      From      To

032151      007      1.3 Hatchback 3d 1297cc      04/09/2001      30/10/2002
032151      003      1.3 Hatchback 3d 1297cc      01/09/1999      31/01/2000
032151      002      1.3 Hatchback 3d 1297cc      01/04/1999      31/08/1999
032151      001      1.3 Hatchback 3d 1297cc      06/01/1997      31/03/1999

what i would like is the min of the from date and the max of the to date  so here i would expect from 6/1/1997  to 30/10/2002.

how do i extract the min and max of dates i tried but it doesnt work its almost like it treats the dates as strings

Answer : max of date

What are the adtatypes of From & To in your table ?