set @deleteID =( select distinct contact.idContact from contact where  nameContact = 'Alex');
set @deleteMeetID =( select contact_has_meet.idMeet from contact_has_meet where contact_has_meet.idContact = @deleteID);

delete from callclient where callclient.idContact = @deleteID;
delete from e_mail where e_mail.idContact = @deleteID;
delete from phone where phone.idContact = @deleteID;
delete from contact_has_meet where contact_has_meet.idContact = @deleteID;
delete from meet where meet.idMeet in (@deleteMeetID);
delete from contact where contact.idContact = @deleteID;