批量插入，update
#####setting 1
create table t as select * from all_objects where 1 =2;
###.模擬逐行提交的情況，註意觀察執行時間
DECLARE
BEGIN
FOR cur IN (SELECT * FROM t_ref) LOOP
INSERT INTO t VALUES cur;
COMMIT;
END LOOP;
END;
/
###模擬批量提交
DECLARE
v_count NUMBER;
BEGIN
FOR cur IN (SELECT * FROM t_ref) LOOP
INSERT INTO t VALUES cur;
v_count := v_count + 1;
IF v_count >= 100 THEN
COMMIT;
v_count :=0;
END IF;
END LOOP;
COMMIT;
END;
/
更高級的方法，體驗一下極限速度。
DECLARE
CURSOR cur IS
SELECT * FROM t_ref where column=<value>; <-就按照條件篩選數據,
TYPE rec IS TABLE OF t_ref%ROWTYPE;
recs rec;
BEGIN
OPEN cur;
WHILE (TRUE) LOOP
FETCH cur BULK COLLECT
INTO recs LIMIT 100;
FORALL i IN 1 .. recs.COUNT
INSERT INTO t VALUES recs (i);
COMMIT;
EXIT WHEN cur%NOTFOUND;
END LOOP;
CLOSE cur;
END;
/
#####setting 2:
--用 rownum 來限定取出的記錄數來測試
cursor all_contacts_cur is
selectsr_contact_id,contact_phone,remark from sr_contacts where rownum <= 100000;
###seting 3:
要麽就按照條件篩選數據，分別提交
如:
insert into table_a select * from table_b where type=1;
commit;
insert into table_a select * from table_b where type=2;
commit;
就是舉個例子,最後的type要是個全集
#####setting 3:
http://m.blog.itpub.net/30345407/viewspace-2126548/
http://blog.csdn.net/benwang_/article/details/6830383
http://www.oracle.com/technetwork/issue-archive/2008/08-mar/o28plsql-095155.html
http://blog.csdn.net/u011098327/article/details/53941046
######update
declare
i int;--定義變量
v_count int;--定義變量
v_loop int;--定義變量
begin
select count(*) into v_count from test;--計算表內數據總數
select ceil(v_count/10) into v_loop from dual;--計算需要循環次數
i:=1;--為i賦值
while i<=v_loop loop--循環退出條件
update test set begintime=sysdate where begintime is null and rownum<=10;--執行更新
commit;--提交
i:=i+1;--i依次加1
end loop;--結束循環
end;
批量插入，update