我在MySQL数据库中有一个表lastviewed，CREATETABLE`lastviewed`(`id`bigint(20)NOTNULLAUTO_INCREMENT,`record_id`int(11),`product_id`int(11)NOTNULLDEFAULT'0',`user_id`int(11)NOTNULL,`lastviewed`datetimeNOTNULL,PRIMARYKEY(`id`))ENGINE=InnoDBDEFAULTCHARSET=latin1AUTO_INCREMENT=1;我需要获取此表的最后4行ORDERBYlastviewedDESCL