select concat('changchun','_',class_id) as id,class_id as pk,bh,class_name,class_alias,date_format(jbny, '%Y-%m-%d') as jbny,schooling_length,stage_id,teacher_id,org_id,bureau_id,b_use,province_id,city_id,district_id,date_format(create_time, '%Y-%m-%d %H:%i:%s') as create_time,create_person,date_format(last_updated_time, '%Y-%m-%d %H:%i:%s') as last_updated_time,last_updated_person,'t_base_class' as table_name  from t_base_class where last_updated_time>:sql_last_value