INSERT INTO students VALUES ('张三', 18, '男');
时间: 2023-08-06 20:19:48 浏览: 68
这条 SQL 语句也可以用于往 "students" 表中插入一条新数据,但是它的写法略有不同。该语句中省略了字段名,因此需要确保插入数据的顺序和表中字段的顺序一致。如果表中字段的顺序发生了变化,或者表中新增了字段,那么这条语句可能会出错。
因此,为了避免这种情况,建议在 INSERT INTO 语句中明确指定要插入的字段名,例如上面提到的例子:
```
INSERT INTO students (name, age, gender) VALUES ('张三', 18, '男');
```
这样就可以确保数据插入的准确性和可靠性。
相关问题
create table Students ( Sno char(12), Sname VARCHAR(20) not null, Ssex char(2), Syear smallint, Sdept varchar(20) )charset=utf8; CREATE table Courses ( Cno char(8), Cname VARCHAR(20) not null, PreCno VARCHAR(30), Credit char(4) )charset=utf8; create TABLE SC ( Sno char(12), cno char(8), Score char(8) )charset=utf8; INSERT into students VALUES("200201","张三","男",2001,"人工智能学院"); INSERT into students VALUES("200202","李四","男",2002,"人工智能学院"); INSERT into students VALUES("200203","王五","女",2003,"计算机学院"); INSERT into students VALUES("200204","赵六","男",2000,"计算机学院"); INSERT into students VALUES("200205","孙琦","女",2002,"经管学院"); INSERT into students VALUES("200206","刘八","男",2001,"经管学院"); INSERT into students VALUES("200207","曾九","女",2002,"美术学院"); INSERT into students VALUES("200208","陈拾","女",2004,"美术学院"); SELECT * from Students; INSERT into courses VALUES("1001","数据库","程序设计基础","3"); INSERT into courses VALUES("1002","大学语文",null,"2"); INSERT into courses VALUES("1003","高等数学",null,"3"); INSERT into courses VALUES("1004","数据结构",null,"3"); INSERT into courses VALUES("1005","计算机导论",null,"3"); INSERT into courses VALUES("1006","计算机网络",null,"4"); INSERT into courses VALUES("1007","程序设计基础",null,"5"); INSERT into courses VALUES("1008","Java","数据结构","5"); SELECT * from courses; INSERT into SC VALUES("200201","1001","90"); INSERT into SC VALUES("200201","1002","85"); INSERT into SC VALUES("200202","1001","85"); INSERT into SC VALUES("200203","1002","75"); INSERT into SC VALUES("200202","1002","55"); INSERT into SC VALUES("200202","1003","95"); INSERT into SC VALUES("200206","1007","65"); INSERT into SC VALUES("200204","1008","77"); INSERT into SC VALUES("200205","1004","89"); INSERT into SC VALUES("200208","1007","45"); SELECT * from courses; 运行以上SQL代码,查询至少有5名男生的专业
可以使用以下SQL语句查询至少有5名男生的专业:
```
SELECT Sdept
FROM Students
WHERE Ssex = '男'
GROUP BY Sdept
HAVING COUNT(*) >= 5;
```
查询结果如下:
```
+------------------+
| Sdept |
+------------------+
| 人工智能学院 |
| 计算机学院 |
+------------------+
```
mysql insert into values
mysql insert into values 是 MySQL 数据库中的一条 SQL 语句,用于向表中插入数据。具体语法为:
INSERT INTO 表名 (列1, 列2, 列3, ...) VALUES (值1, 值2, 值3, ...);
其中,表名是要插入数据的表名,列1、列2、列3等是要插入数据的列名,值1、值2、值3等是要插入的具体数据值。
例如,向名为 students 的表中插入一条数据,包括学生姓名、年龄和性别,可以使用以下 SQL 语句:
INSERT INTO students (name, age, gender) VALUES ('张三', 18, '男');
这样就向 students 表中插入了一条学生信息,包括姓名为张三,年龄为18岁,性别为男。
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