编写一个名为“sp_zong”的存储过程,它能根据学生姓名统计该学生的总成绩并能将成绩返回给调用者,写出创建存储过程及执行存储过程的T-SQL语句
时间: 2023-07-08 13:17:50 浏览: 50
好的,以下是创建存储过程及执行存储过程的T-SQL语句:
创建存储过程:
```
CREATE PROCEDURE sp_zong
@name NVARCHAR(50)
AS
BEGIN
SELECT SUM(score) AS total_score
FROM student
WHERE name = @name
END
```
执行存储过程:
```
EXEC sp_zong '小明'
```
其中,`sp_zong`是存储过程的名称,`@name`是输入参数,`SUM(score)`是用于计算总成绩的聚合函数,`FROM student`是指定需要查询的表名,`WHERE name = @name`是根据输入参数进行筛选。执行存储过程时,需要传入一个学生姓名,存储过程会返回该学生的总成绩。
相关问题
编写一个类Zong1.java,建立一个对象数组,存放10个学生的学号、姓名、成绩,统计这10个学生的平均成绩,搜索最高成绩和最低成绩的学生的姓名和学号。
下面是Zong1.java的代码实现:
```java
public class Zong1 {
public static void main(String[] args) {
Student[] students = new Student[10];
students[0] = new Student("001", "张三", 80);
students[1] = new Student("002", "李四", 85);
students[2] = new Student("003", "王五", 90);
students[3] = new Student("004", "赵六", 75);
students[4] = new Student("005", "钱七", 70);
students[5] = new Student("006", "孙八", 95);
students[6] = new Student("007", "周九", 87);
students[7] = new Student("008", "吴十", 92);
students[8] = new Student("009", "郑十一", 78);
students[9] = new Student("010", "冯十二", 83);
double sum = 0;
double avg = 0;
double maxScore = 0;
double minScore = Double.MAX_VALUE;
String maxName = "";
String maxId = "";
String minName = "";
String minId = "";
for (int i = 0; i < students.length; i++) {
sum += students[i].getScore();
if (students[i].getScore() > maxScore) {
maxScore = students[i].getScore();
maxName = students[i].getName();
maxId = students[i].getId();
}
if (students[i].getScore() < minScore) {
minScore = students[i].getScore();
minName = students[i].getName();
minId = students[i].getId();
}
}
avg = sum / students.length;
System.out.println("平均成绩:" + avg);
System.out.println("最高成绩学生:" + maxName + " 学号:" + maxId + " 成绩:" + maxScore);
System.out.println("最低成绩学生:" + minName + " 学号:" + minId + " 成绩:" + minScore);
}
}
class Student {
private String id;
private String name;
private double score;
public Student(String id, String name, double score) {
this.id = id;
this.name = name;
this.score = score;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getScore() {
return score;
}
public void setScore(double score) {
this.score = score;
}
}
```
输出结果为:
```
平均成绩:83.5
最高成绩学生:孙八 学号:006 成绩:95.0
最低成绩学生:钱七 学号:005 成绩:70.0
```
select count(*) from wwx1249869.wttx_zdguihua_zong,select count(*) from hwx1118357.zdguihua_zong4如何将这两个结果放一起查询一起展示
你可以使用UNION ALL操作符将这两个结果合并为一个结果集,例如:
```
select count(*) as count from wwx1249869.wttx_zdguihua_zong
union all
select count(*) as count from hwx1118357.zdguihua_zong4;
```
这将返回一个包含两行的结果集,其中每行都包含一个名为count的列,分别显示两个表中的记录数。
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