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

mysql字段編碼排序規則不一致導致查詢報錯：Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLICIT) for operation '= 查詢的sql語句爲： SELECT A.`id` FROM `news` A WHERE NOT EXISTS (SELECT B.`news_id`

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