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:SELECTa.equ_no,b.fullCodeFROMequipmenta,(SELECTt.*,getEquTypeFullCode(t.equType_id)ASfullCodeFROMequ_typet)bWHEREsubstring(a.equ_no,1,5)=b.fullCode错误如下:[Err]1267-Illegalmixofcol