SQL Server database files to import mdf

Method One:
1. Create a new query and enter the following code, click F5 key or click the Run button

EXEC sp_attach_db @dbname = 'your database name'

@ Filename1 = 'mdf file path (conjugated package name)',

@ Filename2 = 'Ldf file path (conjugated package name)'

EXEC  sp_attach_db  @dbname  =  'empmanasys',     

@filename1  =  '/var/opt/mssql/data/empmanasys.mdf',     

@filename2  =  '/var/opt/mssql/data/empmanasys_log.ldf'

2. If it fails needed permission to open

Method Two: Additional