销售订单：限制客户参考编号不能重复

代码示例

--销售订单：限制客户参考编号不能重复
IF @object_type = '17'
	BEGIN
		IF @transaction_type = 'A'
		OR @transaction_type = 'U'
			BEGIN
				IF EXISTS (
					SELECT T0.docentry, T0.[NumAtCard], ts.docentry, Ts.[NumAtCard]
					FROM ORDR T0
						INNER JOIN (
							SELECT T0.[NumAtCard], T0.docentry
							FROM ORDR T0
						) Ts
						ON Ts.[NumAtCard] = T0.[NumAtCard]
							AND Ts.docentry <> T0.docentry
					WHERE T0.[NumAtCard] IS NOT NULL
						AND T0.DocEntry = @list_of_cols_val_tab_del
				)
					BEGIN
						SET @error = 1;
						SET @error_message = N'当前客户参考编号已存在!         ---- 来源于单据控制：销售订单限制客户参考编号不能重复
 ';
					END;
			END;
	END

效果图