将3列插入到表中，其中只有2列来自另一个表

Question

I wish to do something like this:

INSERT INTO table2
(col1, col2, col3 = 'constant literal')
SELECT col1, col2
FROM table1;

So col1 and col2 are copied from table1 to table2, but col3 is set to be a constant value I want. The code above does not work. so how do i do this? I don't want set a default value to col3 by changing the schema.

I am using sqlite3 if relevant.

Answer 1

INSERT INTO table2 (col1, col2, col3)
SELECT col1, col2, 'constant literal'
FROM table1