开发时,一般都是使用PL/SQL工具进行开发,查看编译错误及重新编译都很简单,但是一般的生产环境是不允许连接外界工具的,只能在命令行中进行重新编译及查看,今天我就遇到了这个问题,现在总结如下: 1.获取数据库中的无效对象: ; col owner format a10 col object_name format a45 col object_type format a20 col status format a20 SELECT owner, object_name, object_type,
hello world // Define a function. printNumber(num aNumber) { print('The number is $aNumber.'); // Print to console. } // This is where the app starts executing. main() { var number = 42; // Declare and initialize a variable. printNumber(number); // C
官网教程 https://www.dartlang.org/guides/language/language-tour dart是一个单线程的语言,没有多线程 Final and const If you never intend to change a variable, use final or const, either instead of var or in addition to a type. A final variable can be set only once; a con