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DATE requires the date to be in a date format it recognizes. Try this 
expression instead to convert the date to ISO format first:

days(current date) - days(date(substr(digits(hhdob),1,4) || '-' || 
substr(digits(hhdob),5,2) || '-' || substr(digits(hbdob),7,2)))

If that doesn't work take every element of the express and but them in their 
own column to see which one is fouling up the whole expression.
  ----- Original Message ----- 
  From: Dave Boettcher 
  To: midrange-l@xxxxxxxxxxxx 
  Sent: Wednesday, August 30, 2006 11:55 AM
  Subject: Calculating difference between dates in SQL


  hello, 

  I have been experimenting with interactive SQL to try to formulate a
  statment for later use.

  What I need to do is calculate an age for a client . The client master
  contains the birth date in numeric form 8,0.

  My statement, culled from various books and articles looks like this:

  SELECT                                       
  days(current date) - days(date(hhdob))       
  "Age" , 
  hhdob, hhnaml, hhnamf,               
    hhcase FROM ClientMaster

  The result always seems to look like this:

          "Age"   BIRTH YYYYMMDD            case           
  ++++++++++++++    19,820,926                 4         
  ++++++++++++++    19,820,924                 5         
  ++++++++++++++    19,840,909                 6         
  ++++++++++++++    19,820,915                 7         
  ++++++++++++++    19,820,806                 8         
  ++++++++++++++    19,810,108                 9         
  ++++++++++++++    19,820,330                10   

  >From reading it seems like age should be a number, why can't I see it?

  Thanks in Advance for any help, 

  Dave Boettcher      

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