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select * from 表A
order by (case when Autherinfoname is null then 1 else 0 end),datetimes
select * from 表A
order by (case when Autherinfoname is null or Autherinfoname='' then 1 else 0 end),datetimes
order by (case when Autherinfoname is null then 1 else 0 end),datetimes