Oracle中在pl/sql developer修改表的2种方法，需要的朋友可以参考一下
一、方式一
select * from student for update
student表需要操作人修改完commit之后才可以做其他的操作，否则该表会被锁住。
二、方式二
select t.*,t.rowid from student t
在pl/sql developer中右击某表，显示的就是该语句，这样做不会将该表锁住。
想修改某几个字段也没有问题select num,name,t.rowid from student t。
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