Syntax: dbkeys(f)
Parameters:
procedure main()
f:=dbopen("mydb","O","user","fbalbi","mypasswd") # open user table
# select host, user and password columns
r:=dbselect(f, "host, user, password","")
write(*f, " row(s) selected")
write("\ntable keys")
krec:=dbkeys(f) # retrieve primary key(s) information
every i:=(1 to *krec) do {
r:=krec[i]
write("[", r["col"], "]") # print key name
}
close(f) # close table
end