MySQL写存储过程时报错

1267- Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=

问题描述 ：

SELECT distinct a.user_id INTO userID FROM authorization_record a WHERE a.open_id = openId AND a.auth_type = '5001'

错误如下：

[Err]1267- Illegal mixofcollations (utf8_unicode_ci,IMPLICIT)and(utf8_general_ci,IMPLICIT)foroperation'='

解决方法 ：

将比较等式一边进行字符串转换，如改为“ CONVERT(b.fullCode USING utf8) COLLATE utf8_unicode_ci ”

SELECT distinct a.user_id INTO userID FROM authorization_record a WHERE a.open_id = CONVERT(openId USING utf8) COLLATE utf8_unicode_ci AND a.auth_type = '5001'

create procedure student()

begin

select stu_no from student -- 加个分号

end

-- 如果加了分号还不行的话,提示的错误应该是

错误：PLS-00428: 在此 SELECT 语句中缺少 INTO 子句

原因是单独的一个select语句在存储过程中是不应该存在的,所以应该改成select stu_no into 的模式

create procedure student()

is

v_stu_no student.stu_no%TYE

begin

select stu_no into v_stu_no from student where rownum <= 1 -- 改成select into 字句

end

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