Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=
问题描述:MySQL进行字符串比较时发生错误:SELECT
a.equ_no,
b.fullCode
FROM
equipmenta,
(
SELECT
t.*,getEquTypeFullCode(t.equType_id)ASfullCode
FROM
equ_typet
)b
WHERE
substring(a.equ_no,1,5)=b.fullCode错误如下:[Err]1267-Ill