使用SQL的位置在两列之间复制数据

Question

id | one  | two
1  | aa   |
2  | da   |
3  | sds  |
4  | as   |
5  | dfss |
6  | r    |
7  | fd   |

如何将所有数据从“one”复制到“two”，其中长度为1 = = 2使用SQL？在这个例子中应该是：

id | one  | two
1  | aa   | aa
2  | da   | da
3  | sds  |
4  | as   | as
5  | dfss |
6  | r    |
7  | fd   | fd

Answer 1

UPDATE your_table SET two = one WHERE LENGTH(one) = 2

Answer 2

这样的事情应该有用，我想：

UPDATE table SET two = one WHERE LENGTH(one) = 2