Question

我创建了一个新程序来从表中删除一行。

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这是我称之为FALL2016的表格 enter image description here

Answer 1

您可以执行delete，然后计算受影响的行数：

DELIMITER //
CREATE PROCEDURE DropCourse ( IN Course_Id VARCHAR(10), IN Student_Id VARCHAR(10))
BEGIN
    delete from FALL2016
    where StudentId = Student_Id AND CourseId = Course_Id
    limit 1;

    select @rc := row_count();

    IF @rc > 0 THEN
        SELECT 'Course Deleted from Registry.'
    ELSE
        SELECT 'Not registered for course selected, no action taken.'
    END IF;
END;//

DELIMITER ;

＃1109 - 未知表 - 调用过程

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