declare  
      
cursor csrn_mon
is          
select *       
from table2;           
row_mon csrn_mon%rowtype;

cursor csrn_loc
is
select * 
from table1;
row_loc csrn_loc%rowtype;

cursor csrn_del
is
select xh from table1 minus select xh from table2;
row_del csrn_del%rowtype;

cursor csrn_ins
is
select xh from table2 minus select xh from table1;
row_ins csrn_ins%rowtype;

begin       
     
for row_mon in csrn_mon loop           
    for row_loc in csrn_loc loop  
        if row_loc.xh = row_mon.xh then
           dbms_output.put_line(‘更新信息:‘ || row_loc.xh);
        end if;
    end loop;
end loop;

for row_del in csrn_del loop
    dbms_output.put_line(‘删除信息:‘ || row_del.xh);
end loop;

for row_ins in csrn_ins loop
    dbms_output.put_line(‘插入信息:‘ || row_ins.xh);
end loop;

end;