sql = "if not exists(select * from Sw_Shopping where Name='" + name + "') insert into Sw_Shopping(UserIP,SelectId,Name,Pic,Dec,Sw_Price,Carriage,GoodsNum) values ('" + UserIP + "','" + Id + "','" + name + "','" + pic + "','" + dec + "','" + Sw_Price + "','" + Carriage + "',1)";
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