substr()截取字符串信息

select t.createtime,SUBSTR(t.createtime, 0, 10), SUBSTR(t.createtime, 0, 13), SUBSTR(t.createtime, 0, 16) ,SUBSTR(t.createtime, 0, 19) from OA_EDDOCUMENT t where 1=1 select to_char(to_date(SUBSTR(t.cr

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