SQL复制表中的数据

Question

我想复制一个表中的一些数据，并且只更改一列。它看起来如下：

Before:

C1 C2 C3 ....  // C1 C2 C3 are columns, C3 have same value

a1 b1 c
a2 b2 c
a3 b3 c


After:  

C1 C2 C3 ....  // for the copy, all columns are same except C3, all c and f are same value

a1 b1 c
a2 b2 c
a3 b3 c
...
a1 b1 f
a2 b2 f
a3 b3 f

有没有快速的方法在sql中执行此操作？谢谢！

Answer 1

insert into your_table (C1, C2, C3)
select C1, C2, 'f'
from your_table