Обсуждение: How to set constraint on ...?

Hi,
I have following  table named account.  How to use SQL commands to set constraint like “ X value of A 
 +  X value of B > 0”  in following table? 

I appreciate your great help.

--Rui.


                     


                  
Table: account 





 NAME(:char)

  X (: integer)

   ...


  A

         20

  ...


  B

         10

 ...
 
 
 
 
 
 
 
 
 
 

 

 

 
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