参考网址:http://database.51cto.com/art/201103/250046.htm
SQL Server数据库多种方式查找重复记录
select * from dbo.T0058_PointObjectGIS where C0058_Lon in(select C0058_Lon from T0058_PointObjectGIS group by C0058_Lon having(COUNT(*))>1)
select c0130_entcode,c0130_entname,COUNT(*) from T0140_EntList group by c0130_entcode,c0130_entname