批量操作

oracle：
declare
v_num number(8):=0;
BEGIN
FOR i IN (select id from T_BRAND ) LOOP
delete from T_BRAND de where de.id = i.ID;
v_num := v_num+1;
if v_num >=500
then
v_num :=1;
commit;
end if;
END LOOP;
END;

mongo：
for (i=0;i<1000000;i++){
db.users.insert(
{
"i":i,
"username":"user"+i,
"age":Math.floor(Math.random()*120),
"create":new Date()
}
);
}