带有if条件的mysql存储过程出现错误

下面是在mysql中创建存储过程的代码

但它给了我这个错误

错误1064 42000：您的SQL语法有错误；检查与您的MySQL服务器版本对应的手册，以了解使用“else”附近的正确语法 选择“有超过4个stu”作为； 在第15行的“如果”结束

我做错了什么？提前感谢

其工作原理如下

CREATE DEFINER=`root`@`localhost` PROCEDURE `GetCustomerLevel`()
BEGIN
         if(select count(name) from s_marks)<4
      then

        select 'inside the if statement' as'';
        select 'there are lassee than 4 students' as '';

      else
         select 'there are more than 4 stu' as '';
      end if;
END

---

Mysql不允许在if else语句中使用begin/end。这仅适用于sql server

CREATE DEFINER=`root`@`localhost` PROCEDURE `GetCustomerLevel`()
BEGIN
         if(select count(name) from s_marks)<4
      then

        select 'inside the if statement' as'';
        select 'there are lassee than 4 students' as '';

      else
         select 'there are more than 4 stu' as '';
      end if;
END