Want to specify multi databases/schemas with MYSQL_DATABASE

[hatzhang]

like the following:
MYSQL_DATABASE=db1;db2;db3

there are some workarounds:
https://gist.github.com/MKagesawa/a03892b8c44c015cd991c2c5311f1768

[wglambert]

You can make a .sql file that will create databases and mount it to /docker-entrypoint-initdb.d/
https://github.com/docker-library/docs/tree/master/mysql#initializing-a-fresh-instance

[yosifkit]

Correct, we only support one database in the MYSQL_DATABASE variable and any further SQL needed should be done via /docker-entrypoint-initdb.d/.

See also docker-library/postgres#240 (comment)