UPDATE wp_posts SET post_content = REPLACE(post_content, '旧字符', '新字符') WHERE post_type = 'post' AND post_status = 'publish' and post_content like '%旧字符%';
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数据库运维
UPDATE wp_posts SET post_content = REPLACE(post_content, '旧字符', '新字符') WHERE post_type = 'post' AND post_status = 'publish' and post_content like '%旧字符%';