SELECT count(1) 行数 FROM SB_x_HTCKItem WHERE 客户 = '江阴市' group by [规格], [长度], [库存钢号], [船级社] having (count(1)>1)
select count(1) from ( SELECT DISTINCT [规格], [长度], [库存钢号], [船级社] FROM SB_x_HTCKItem WHERE 客户 = '江阴市')a
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