public Data(string tableName, string name)
			{
				select = (object) name;
				typeobj = typeObj.STRING;
				this.type = ElementType.STRING;
				this.tableName = tableName;
			}
			public Data(SQLStruct name)
			{
				select = (object) name;
				typeobj = typeObj.SQL;
				type = ElementType.STRING;
			}
			public Data(string name, ElementType type1)
			{
				select = (object) name;
				typeobj = typeObj.STRING;
				this.type = type1;
			}