摘要:
#1. 列表生成器num = [x for x in range(1,10)]print(num)old = [x for x in range(1,100) if x % 2 == 1]print(old)print([x * x for x in range(10)])a = ["a","b", 阅读全文
摘要:
/**文档注释 javadoc所解析时,需要在类前面加上public@author ltx@version v1.0this is my first procedure */public class hellotx{ //单行注释:如下的main方法是程序的入口 /*多行注释 注释是给别人看的 1. 阅读全文
摘要:
1.select deptno,min(sal) from emp where job_id='manager' group by deptno; 2.select * from empwhere hiredate=last_day(hiredate); 3.select initcap(ename 阅读全文