if exists( select 1 from t_gpslatest where f_code='12')
(update t_gpslatest set f_style='99',f_longtitude='88',f_latitude='77',f_direction='66',f_speed='55',f_time=sysdate where f_code = '11')
else
(insert into t_gpslatest(f_code,f_style,f_longtitude,f_latitude,f_direction,f_speed,f_time)values('11','22222','333333','44444','55555','66666',sysdate))

DECLARE 
v_num NUMBER 
BEGIN 
  select Count(*) INTO v_num from t_gpslatest where f_code='12';
  IF  v_num!=0 THEN 
    update t_gpslatest set f_style='99',f_longtitude='88',f_latitude='77',f_direction='66',f_speed='55',f_time=sysdate where f_code = '11';
  ELSE 
    insert into t_gpslatest(f_code,f_style,f_longtitude,f_latitude,f_direction,f_speed,f_time)values('11','22222','333333','44444','55555','66666',sysdate);
  END IF;
END;

------解决方案--------------------
探讨

你这个语法不行..

SQL code

DECLARE 
v_num NUMBER 
BEGIN 
  select Count(*) INTO v_num from t_gpslatest where f_code='12';
  IF  v_num!=0 THEN 
    update t_gpslatest set f_style='99',f_longtitude='……


------解决方案--------------------
oracle 10g中MERGE有如下改动：
	1、UPDATE或INSERT子句是可选的
	2、UPDATE和INSERT子句可以加WHERE子句
	3、ON条件中使用堂过滤谓词来INSERT所有的行到目标表中，不需要连接源表和目标表
	4、UPDATE子句后面可以跟DELETE子句来去除一些不需要的行
--示例
MERGE INTO products p
USING new products np
ON (p.product_id =  np. Product_id)
WHERE MATCHED THEN  
UPDATE
SET p. product_name = np. Product_name,
 p.category = np.category
DELETE WHERE (p.category = ‘ELECTRNCS’)
WHEN NOT MATCHED THEN  
INSERT
VALUES (np. Product_id,np. Product_name,np.category)

------解决方案--------------------
1楼回答的很好了，楼主就用1楼的答案撒。