"insert into [C_AD](ADTitle,ADContent,ADType,ADPhoto,ADUrl)" +
"values(N'" + c_AD.ADTitle + "',N'" + c_AD.ADContent + "'," + c_AD.ADType + ",N'" + c_AD.ADPhoto + "',N'" + c_AD.ADUrl + "')"里面那些N是什么的
"values(N'" + c_AD.ADTitle + "',N'" + c_AD.ADContent + "'," + c_AD.ADType + ",N'" + c_AD.ADPhoto + "',N'" + c_AD.ADUrl + "')"里面那些N是什么的
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