see binding parameters in jpa query
What would the world look like if log was not created for us – I ask, and you say nothing! You right, there is also another world 
Getting back from the crazy thoughts, there is a config spring allows us to see the SQL statements that the JPA is doing behind the scenes..
In you application.yml file
...
spring.jpa.show-sql=true
...
Will show the sql statements on your logs. But it will show with ? for the values used.
To see those values also along with the query add the following on the application file.
logging.level.org.hibernate.SQL=debug
logging.level.org.hibernate.type.descriptor.sql=trace
That is it!