Data lost

Hi, I am delete rows from table, with "delete from mytable where id=x", and rows deleted no return in select "select * from mytable where id=x", its OK ! Version "Jul2015-SP1" But, when restart database, deleted rows return in select "select * from mytable where id=x". Its bug ?, or i have execute vacuum command, how to execute vacuum command. ? -- Luciano Sasso Vieira Data Scientist & Solutions Architect luciano@gsgroup.com.br http://www.gsgroup.com.br | tel: 17 3353-0833 | 17 3202-4040 | cel: 17 99706-9335 www.gsgroup.com.br http://www.gsgroup.com.br --- Este email foi escaneado pelo Avast antivírus. https://www.avast.com/antivirus