Can I merge two databases into one in Mysql if they both have the same schema?

Question

I have two databases in MySQL that already have data. they have exactly the same schema. I would like to merge those two databases into one only. I tried:

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Answer 1

Run mysqldump on each database with the --no-create-info option to avoid writing schema information. Then run once on one database with the --no-data option. If you load all of these files sequentially into the same target database, this should work, barring any differences in schema between the two databases or duplicate primary keys.

mysqldump -u root -p --no-create-info database1 > database1.sql
mysqldump -u root -p --no-create-info database2 > database2.sql
mysqldump -u root -p --no-data database1 > schema.sql

After creating a new database, run

mysql -uroot -p -Ddatabase3 < schema.sql
mysql -uroot -p -Ddatabase3 < database1.sql
mysql -uroot -p -Ddatabase3 < database2.sql

This may also work. Don't have a Windows box to test on ATM

type schema.sql database1.sql database2.sql | mysql -uroot -p -Ddatabase3