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create table t (id char, cal1 int); insert into t values ('a', 1), ('b', 0),('a', 2),('c', 1),('a', 3); SELECT top 2 MIN(id) id FROM t GROUP by id ORDER BY NEWID(); select * from t where id in ( SELECT top 2 MIN(id) id FROM t GROUP by id ORDER BY NEWID() );

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