Returns TRUE if a specified database is multi-tenant enabled,
and returns FALSE if it is not. 
     
    Syntax
      
      
          
          
            
              
                IS-DB-MULTI-TENANT( [database-name]) 
               
                
               | 
            
          
        
 
      
        
          - 
            database-name
          
 
          - A character expression that evaluates to a logical database
name or database alias. If no database is specified and more than
one database is connected, the AVM raises an error. If the database
name is not a valid name for a connected database, the AVM raises
an error.