sql server-获取重复数据的第一条

<span style="font-family:Microsoft YaHei;font-size:18px;">select tt1.LSH
from (select t1.zblsh,t1.lsh,
            row_number() over(partition by t1.ZBLSH order by t1.XT_XGRQ desc) rn 
     from  grjx_zbgl_bhgzl t1
		WHERE t1.nf = '2015'
     ) tt1
where tt1.rn <=1</span>

sql server-获取重复数据的第一条

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