方法一：
SELECT a.name,b.rows FROM sysobjects a
INNER JOIN sysindexes b ON a.id=b.id
WHERE b.indid IN(0,1) AND a.Type='u'
ORDER BY b.rows desc
方法二：
CREATE TABLE #temp (TableName VARCHAR (255), RowCnt INT)
EXEC sp_MSforeachtable 'INSERT INTO #temp SELECT ''?'', COUNT(*) FROM ?' select * from #temp order by RowCnt desc
DROP TABLE #temp