**4.4.2 ? 带【in】的嵌套查询**?
select ?emp.empno,emp.ename,emp.job,emp.sal ??
from scott.emp?
where sal in (select sal from scott.emp where ename='WARD');?
上述语句完成的是查询薪水...
sql语句的写法一、使用占位符%sql = "SELECT FLAG from TTRD_AUTH_USER where account = '%s' and account1 = '%s' " % (data，data1)注意点：1、外部是使用双引号2、若sql里面需要用到双引号，需要使用\进行转义，...
public class ForDemo {
public static void main(String[] args) {
//原始写法
System.out.println("HelloWorld");
System.out.println("HelloWorld");
System.out.println("HelloWorld");
System.out.pri...
#define _CRT_SECURE_NO_WARNINGS 1 #include<stdio.h> #include<string.h> int main() { int day = 0; scanf("%d",&day); /*必须定义整形常量*/ switch(day) { case 1: printf("星期1"); ...
The above diagram consists of different components. Let’s take a look at each of these components in detail. DrillBit: Apache Drill consists of a Daemon service called the DrillBit. It is responsib...
金山打字通语句练习的文本the with more could seem leave follow fact war company nothingnear love often car different moment rate door hope piece sharevisit nor river spring lot decision wear clean drea...
