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db2£ºselect * from tabname fetch frist n rows only
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oralce£ºselect * from tabname where rownum <= n
sql server :select top n * from tabname


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SQLServer          CodeSmith                            C#
bigint                    Int64           ......

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select   identity(int,1,1) as col_id , *   into   temp   from  uep.dbo.A_experiment 
select   *   from temp where   col_id   between   50   and   60
drop  table temp ......
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