select
                        distinct(d.idserv) from (
                                select
                                    distinct(u.idserv),
                                    t.usl_ok,
                                    t.id_pac,
                                    u.ds as ds1,
                                    u.lpu,
                                    t.date_1,
                                    t.date_2,
                                    u.id_sluch f
                                 from ut05s50202105 u left join tt05s50202105 t on t.id_sluch_tt=u.id_sluch
                                 where t.usl_ok=1 and u.code_usl<>'181211201') d
                              inner join (
                                    select
                                        distinct(u.id_sluch),
                                        t.usl_ok,
                                        t.id_pac,
                                        u.ds as ds1,
                                        u.lpu,
                                        t.date_2,
                                        u.id_sluch
                                      from ut05s50202104 u left join tt05s50202104 t on t.id_sluch_tt=u.id_sluch
                                      where t.usl_ok=1 and u.code_usl<>'181211201'
                            ) d1 on d.id_pac=d1.id_pac and d.lpu=d1.lpu and d1.ds1=d.ds1
                        where datediff(day, d1.date_2,d.date_1)<30