两页中重复项的Google表格自定义公式

Question

我在Google电子表格的A栏数据验证框中输入了一个有效的自定义公式，禁止在同一列A中输入重复项。

  

= COUNTIF（$ A $ 3：$ A $ 1677 A3）＆LT; = 1

现在我有另一列B列，我希望上述公式在A栏中从A栏移动，以便它提供以下方式：

    

+---+------------+-------------+
|   |     A      |      B      | <-- the custom formula to be kept in column B only (in the data validation box).
+---+------------+-------------+
| 1 | John       | MySQL       | <-- if this row/data is already existing, then
| 2 | John       | Oracle      | <-- this entry is allowed (bcoz the data in this row do not match with data in the above row (considering both columns), and
| 3 | Viv        | MySQL       | <-- this entry is also allowed (bcoz the data in this row also do not match with data in the above two rows (considering both columns), and
| 4 | Al         | SQL         | <-- this entry is also allowed (bcoz the data in this row also do not match with data in the above three rows (considering both columns), but,
| 5 | Viv        | MySQL       | <-- this entry is NOT allowed (bcoz the data in this row entirely match with data in one of the above rows - row no. 3 (considering both columns).       
+---+------------+-------------+

我已经修改了上述公式，如下所示：

  

= COUNTIF（$ A $ 3：$ B $ 1677 B3）＆LT; = 1

但它不符合上述第二个条件（Viv，MySQL）。

Answer 1

试试这个：

=COUNTIF(ARRAYFORMULA($A$3:$A$1677&$B$3:$B$1677),A3&B3)<=1

不是单独检查每个列，而是将这些值连接在一起并检查是否存在更多的连接字符串！

希望有所帮助！