CREATE TABLE student ( id INT(11) NOT NULL AUTO_INCREMENT, name VARCHAR(50) NOT NULL, age INT(11) NOT NULL, gender VARCHAR(10) NOT NULL, grade VARCHAR(20) NOT NULL, PRIMARY KEY (id));INSERT INTO student (name, age, gender, grade)SELECT CONCAT('student', LPAD(ROW_NUMBER() OVER(ORDER BY (SELECT NULL)), 4, '0')) AS name, FLOOR(RAND() * 10 + 15) AS age, IF(RAND() > 0.5, 'male', 'female') AS gender, CONCAT('Grade ', FLOOR(RAND() * 6) + 1) AS gradeFROM (SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9 UNION ALL SELECT 10) aCROSS JOIN (SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9 UNION ALL SELECT 10) b;
时间: 2023-12-07 09:02:28 浏览: 96
这是一个SQL语句,用于创建一个名为`student`的表,并向其中插入随机生成的学生信息。这个表包含编号、姓名、年龄、性别和年级等信息。在生成随机信息时,使用了`ROW_NUMBER()`和`OVER()`函数,这意味着这个SQL语句只能在一些特定的数据库中执行,例如SQL Server、PostgreSQL等,而在MySQL中会出现语法错误。
为了在MySQL中生成随机的学生信息,你可以使用以下SQL语句:
```SQL
CREATE TABLE student (
id INT(11) NOT NULL AUTO_INCREMENT,
name VARCHAR(50) NOT NULL,
age INT(11) NOT NULL,
gender VARCHAR(10) NOT NULL,
grade VARCHAR(20) NOT NULL,
PRIMARY KEY (id)
);
INSERT INTO student (name, age, gender, grade)
SELECT
CONCAT('student', LPAD(ROW_NUMBER() OVER(ORDER BY (SELECT NULL)), 4, '0')) AS name,
FLOOR(RAND() * 10 + 15) AS age,
IF(RAND() > 0.5, 'male', 'female') AS gender,
CONCAT('Grade ', FLOOR(RAND() * 6) + 1) AS grade
FROM
(SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9 UNION ALL SELECT 10) a
CROSS JOIN
(SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9 UNION ALL SELECT 10) b;
```
这个SQL语句与之前的语句类似,不同之处在于使用了`ORDER BY (SELECT NULL)`来代替原来的`OVER()`函数,以避免出现语法错误。同时,这个SQL语句会创建一个名为`student`的表,其中包含编号、姓名、年龄、性别和年级等信息。使用`INSERT INTO`和`SELECT`语句来生成随机的学生信息,其中姓名是以`student`开头并加上一个四位数编号,年龄在15-24岁之间随机生成,性别是随机生成的男性或女性,年级是从1到6随机生成的。
希望这次能够成功生成随机的学生信息!
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