You can use below query to generate DBCC Shrikfile command for data and log file. Next step you have to copy the output from the result windows & execute it.

Query

select 'use ' + db_name(dbid) + char(13) + 'dbcc shrinkfile (' + quotename(sf.name,'''') + ' ,truncateonly)' from sysaltfiles sf
inner join sys.databases sd on sf.dbid = sd.database_id
where state_desc = 'online'