How to get size of mysql database?

Question

How to get size of a mysql database?
Suppose the target database is called \"v3\".

Answer 1

It can be determined by using following MySQL command

SELECT table_schema AS "Database", SUM(data_length + index_length) / 1024 / 1024 AS "Size (MB)" FROM information_schema.TABLES GROUP BY table_schema

Result

Database    Size (MB)
db1         11.75678253
db2         9.53125000
test        50.78547382

Get result in GB

SELECT table_schema AS "Database", SUM(data_length + index_length) / 1024 / 1024 / 1024 AS "Size (GB)" FROM information_schema.TABLES GROUP BY table_schema