MySQL 不会创建 table 或用值填充它。

Question

在下面的代码中，我声明了一个游标，然后在不久之后创建了一个 table。然后循环并将值添加到 table:

DELIMITER //
DROP PROCEDURE IF EXISTS studentinfo//
CREATE PROCEDURE studentinfo()
BEGIN
 -- Declare local variables
 DECLARE done BOOLEAN DEFAULT 0;
 DECLARE studentNum INT(2);
 DECLARE gradepoint DECIMAL(3,2);
 DECLARE lastName VarChar(15);
 DECLARE classYear INT(1);
 -- Declare the cursor
 DECLARE studentNumber CURSOR
 FOR
 SELECT Student_number FROM student;
 -- Declare continue handler
 DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done=1;
 -- Create a table to store the results
 **CREATE TABLE IF NOT EXISTS studentdata(gpa DECIMAL(3,2), LName VarChar(15),class INT(1));**
 -- Open the cursor
 OPEN studentNumber;
 -- Loop through all rows
 REPEAT
 -- Get student number
 FETCH studentNumber INTO studentNum;
 -- Get gpa
 Select student_gpa(studentNum) INTO gradepoint;
 -- Get name
 Select LName from student WHERE Student_number = studentNum INTO lastName;
 -- get grade level
 Select Class from student WHERE Student_number = studentNum INTO classYear;
 -- Insert info into table
 **INSERT INTO studentdata(gpa,Lname,class)
 VALUES(gradepoint, lastName, classYear);**
 -- End of loop 
 UNTIL done END REPEAT;
 -- Close the cursor
 CLOSE studentNumber;
 END//
 DELIMITER ;

然后当我从学生数据中转到运行 Select * 时，它给了我一个 'table does not exist' 错误。我可以通过运行创建 table 的一行代码手动创建 table，但如果我运行整个代码块，它就不会创建它。即使我手动创建它，它仍然不会填充任何值。我在这里做错了什么？谢谢

Answer 1

到目前为止，您只定义了一个存储过程。为了在 sp 中创建 table，您必须调用 studentinfo sp。

MySQL 不会创建 table 或用值填充它。

MySQL will not create a table or fill it with values.

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