mysql--根據birth計算age並更新全部字段

1：根據身份證號sfzh補充birthweb UPDATE patient set birth=cast(substring(sfzh,7,8) as date) 2：根據birth計算age並修改全部sql UPDATE patient AS A INNER JOIN (SELECT patid,TIMESTAMPDIFF(YEAR,birth,NOW()) as newage FROM pat

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