对于一个表中的所有条目，添加到另一个表中

Question

Database looks like this:

table1

id   | name
1    | James
2    | Rick
3    | Carl

table2

id   | age | gender
<this table is empty>

I want to make a query that passes the same data for all ID's into table2. So after the query the database would look like the following:

table1

id   | name
1    | James
2    | Rick
3    | Carl

table2

id   | age | gender
1    | 20  | male
2    | 20  | male
3    | 20  | male

I've tried to make some INNER JOIN queries, but I can't seem to make it work. Any suggestions?

Answer 1

Do you want this?

insert into table2 (id, age, gender)
    select id, 20, 'male'
    from table1;

Normally, id s are defined automatically, so you can probably leave that out:

insert into table2 (age, gender)
    select 20, 'male'
    from table1;

Answer 2

It looks like you want id s from table1 , and then fixed values for other columns.

If so, consider the insert... select syntax:

insert into table2 (id, age, gender)
select id, 20, 'male' from table1

Answer 3

You can do it like described here:

https://www.w3schools.com/sql/sql_insert_into_select.asp

could be something like

INSERT INTO table2 (id, age, gender)
SELECT id,
       20,
       'male'
FROM table1
WHERE 1 = 1;