MySQL implements inserting data from one table into another table

mysql Insert data from one table into another table

1. The data of the two tables are exactly the same

insert into  New table  select * from  Old table 

2. The new table has more fields than the old table

hypothesis , I want to insert the data of the old table into the new table , But the new watch is not exactly the same as the old one , One more field n

insert into  New table  select *, New value field  as n from  Old table