MySQL不會創建表或使用值填充它。

Question

在下面的代碼中，我聲明瞭一個遊標，然後在創建一個表之後不久。然後，它通過循環，並增加值表：

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 ; 

當我然後再從studentdata運行SELECT *，它給了我一個「表不存在」的錯誤。我可以通過運行創建表的一行代碼手動創建表，但如果我運行整個代碼塊，它將不會創建它。即使我手動創建它，它仍然不會用任何值填充它。我在這裏做錯了什麼？謝謝。

Answer 1

到目前爲止，您只定義了一個存儲過程。爲了在sp中創建該表，您必須調用studentinfo sp。