select m.*, c.NAME as CORP_NAME
from MAIL_LOG as m, CORP as c
where m.SEND_DATE >= '$term_from' and m.SEND_DATE <= '$term_end' ";
和
Select DISTINCT `TO_NAME_F_KANA` from MAIL_LOG group by m.SEND_DATE;
TO_NAME_F_KANA
我喜欢使用as 参考从第一个查询中获取唯一值。