Question

我希望我的函数在函数参数
中放入“INC”时返回“INC”

SELECT getEquivalentGrade('INC');

输出：INC

DELIMITER $$

USE `nmsc_scholarship_db`$$

DROP FUNCTION IF EXISTS `getEquivalentGrade`$$

CREATE DEFINER =`root`@`localhost` FUNCTION `getEquivalentGrade`(grade CHAR(5))
  RETURNS CHAR(5)
  CHARSET latin1
  BEGIN
    DECLARE equivalent_grade CHAR(5);

    IF (grade > 100)
    THEN
      SET equivalent_grade = '1';

    ELSEIF (grade < 69)
      THEN
        SET equivalent_grade = '5';

    ELSEIF (grade = 'INC')
      THEN
        SET equivalent_grade = grade;

    ELSE
      SET equivalent_grade = (SELECT equivalent_grade.`equivgrade`
                              FROM equivalent_grade
                              WHERE equivalent_grade.`fromgrade` <= grade AND equivalent_grade.`tograde` >= grade);

    END IF;
    RETURN equivalent_grade;
  END$$

DELIMITER ;

现在，如果我将执行此功能，这就是我得到的。

SELECT getEquivalentGrade('INC');

输出：5

Answer 1

您应该将INC移至TOP

    public class Login extends Main{    
public void login() throws IOException{
File src = new File("F:\\selenium\\AutomationData.xlsx");
FileInputStream fin = new FileInputStream(src);
XSSFWorkbook wbook = new XSSFWorkbook(fin);
XSSFSheet sheet = wbook.getSheetAt(0);
WebElement username =driver.findElement(By.id("ei-login-Username"));
username.sendKeys("12365478");
WebElement next =driver.findElement(By.id("btnSubmit"));
next.click();
driver.manage().timeouts().implicitlyWait(6, TimeUnit.SECONDS);
WebElement pin =driver.findElement(By.id("ei-login-Pin"));
pin.sendKeys("971997");
WebElement login =driver.findElement(By.id("btnPinSubmit"));
login.click();

}

你应该研究IFELSE是如何运作的。条件工作就像它会停止/转到ENDIF ..如果**条件真正符合，或者他们会一直找到最新 IF

MySQL函数IF（）不返回我声明的值

1 个答案: