如下查询,会抛出错误:
mysql> select sal as salary, comm as commission from emp where salary < 5000;ERROR 1054 (42S22): Unknown column 'salary' in 'where clause'
解决方案
将查询作为内联视图就...
如下查询,会抛出错误:
mysql> select sal as salary, comm as commission from emp where salary < 5000;ERROR 1054 (42S22): Unknown column 'salary' in 'where clause'
解决方案
...
一、通过构造方法实例化Bean
bean中加构造方法
public class Bean1 {
public Bean1() {
System.out.println("Bean1构造方法.Bean1");
}
}
xml中配置Bean
<bean class="main.java.jirath.spr...