SQL Developer似乎认为您正在运行纯DML(数据操作)脚本，而不是DDL(数据定义)脚本.它还认为:new.id是可绑定变量.

It seems that SQL Developer thinks that you are running a plain DML (data manipulation) script, not a DDL (data definition). It also thinks that :new.id is a bindable variable.

为什么会这样，我不知道；为什么?我无法在Oracle SQL Developer 2.1中复制它.

Why this happens, I don't know; I can't reproduce it in Oracle SQL Developer 2.1.

尝试在theschema模式中打开一个新的SQL工作表窗口，并按 F5 (不是 F9 )执行整个"脚本(不是语句)

Try to open a new SQL worksheet window in the theschema schema and execute a "whole" script (not a statement) by pressing F5 (not F9).