mysql - SQLFiddle 的存储过程和游标

Question

我开发了一个小程序，它实现了一个游标，以根据该部门员工的薪水更新该部门的薪水。我想使用 SQLFiddle 测试这个过程，因为它很方便，但我似乎无法弄清楚如何。我已将下面的代码放在架构中创建表和插入行的下方。我还将查询终止符更改为双斜杠。它看起来如下:

DELIMITER //

CREATE PROCEDURE updateSalary()
BEGIN
  DECLARE emp_sal, eDno, dDno INT;
  DECLARE dep_cursor SELECT Dno FROM Department;
  DECLARE emp_cursor SELECT Dno, Salary FROM Employee;
  DECLARE CONTINUE HANDLER FOR NOT FOUND SET finished = 1;

  open dep_cursor;
  department_loop: LOOP
    FETCH dep_cursor INTO dDno;
    IF finished = 1 THEN
      LEAVE department;
    END IF;

    open emp_cursor;

    DECLARE total_sum INT DEFAULT 0;
    employee_loop: LOOP
      FETCH emp_cursor INTO eDno, emp_sal;
      IF eDno = dDno THEN
        total_sum = total_sum + emp_sal;
      END IF;
      IF finished = 1 THEN
        update department SET total_sal WHERE department.dno = dDno;
        LEAVE employee_loop;
      END IF;
    END LOOP employee_loop;
    close emp_cursor;
  END LOOP department_loop;
  CLOSE dep_cursor;
END

DELIMITER//

我得到的错误是:

Schema Creation Failed: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DELIMITER' at line 1: 

我的最后一个问题是，如何在 SQLFiddle 中调用这个存储过程？

谢谢

更新:这是整个架构，我已将其编辑为使用单个斜杠作为终止符，并且还更改了查询终止符。

CREATE TABLE Department (
  Dname varchar(80),
  Dno int primary key,
  Total_sal int,
  Manager_ssn int
)/


CREATE TABLE Employee (
  Name varchar(80),
  SSN int primary key,
  Salary int,
  Dno int references Department(Dno),
  Supervisor_ssn int references Employee(SSN)
)/

ALTER TABLE Department ADD FOREIGN KEY (Manager_ssn) REFERENCES Employee(SSN)/


INSERT INTO Employee VALUES ('John James', 555555555, 5000, NULL , NULL)/
INSERT INTO Department VALUES ('Finance', 20, 7000, 555555555)/
INSERT INTO Department VALUES ('Main', 30, 6000, 555555555)/
INSERT INTO Employee VALUES ('Tammy James', 222222222, 6000, 30, 555555555)/
INSERT INTO Department VALUES ('IT', 10, 3000, 222222222)/
INSERT INTO Employee VALUES ('John Jones', 111111111, 1000, 10, 222222222)/
INSERT INTO Employee VALUES ('Sally Smith', 333333333, 6000, 10, 222222222)/
INSERT INTO Employee VALUES ('Tom Jones', 444444444, 3000, 20, 555555555)/
INSERT INTO Employee VALUES ('Sue Smith', 666666666, 4000, 20, 555555555)/


CREATE PROCEDURE updateSalary()
BEGIN
  DECLARE emp_sal, eDno, dDno INT;
  DECLARE dep_cursor SELECT Dno FROM Department;
  DECLARE emp_cursor SELECT Dno, Salary FROM Employee;
  DECLARE CONTINUE HANDLER FOR NOT FOUND SET finished = 1;

  open dep_cursor;
  department_loop: LOOP
    FETCH dep_cursor INTO dDno;
    IF finished = 1 THEN
      LEAVE department;
    END IF;

    open emp_cursor;

    DECLARE total_sum INT DEFAULT 0;
    employee_loop: LOOP
      FETCH emp_cursor INTO eDno, emp_sal;
      IF eDno = dDno THEN
        total_sum = total_sum + emp_sal;
      END IF;
      IF finished = 1 THEN
        update department SET total_sal WHERE department.dno = dDno;
        LEAVE employee_loop;
      END IF;
    END LOOP employee_loop;
    close emp_cursor;
  END LOOP department_loop;
  CLOSE dep_cursor;
END;
/

当我尝试构建架构时收到的新错误是:

Schema Creation Failed: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT Dno FROM Department;
  DECLARE emp_cursor SELECT Dno, Salary FROM Employe' at line 4: 

Answer 1

使用;以外的查询终止符。
使用 Browser 按钮旁边的左侧第四个按钮选择它。
请点击此链接查看如何在 SqlFiddle 中创建和运行 MySql 程序:http://sqlfiddle.com/#!2/db743/1
我在这个演示中使用了/查询终止符。

CREATE TABLE x( x int )/

INSERT INTO x VALUES(1),(2),(3)/

CREATE PROCEDURE update_salary()
BEGIN
  UPDATE x SET x = x + 100;
END;
/

========== 编辑 =================

在遇到语法错误时，我使用了以下过程:

消息说错误在第 4 行:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT Dno FROM Department; DECLARE emp_cursor SELECT Dno, Salary FROM Employe' at line 4:

首先我在程序中编号:

1. CREATE PROCEDURE updateSalary()
2. BEGIN
3.   DECLARE emp_sal, eDno, dDno INT;
4.   DECLARE dep_cursor SELECT Dno FROM Department;

似乎这一行是错误的:DECLARE dep_cursor SELECT Dno FROM Department;

为了检查这一行的语法，我使用了这个检查工具:checking tool
此工具显示 here正确的语法应该是:

DECLARE cursor_name CURSOR FOR select_statement

然后我使用上面的代码更正代码:

 4.   DECLARE dep_cursor CURSOR FOR SELECT Dno FROM Department;

然后再次尝试编译代码。
现在它在第 5 行显示下一个错误:

check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT Dno, Salary FROM Employee; END' at line 5:

所以我对第 5 行重复上述过程......等等，等等。