how to see users and their permissions in sql server code example

Example: sql server list user permissions

-- SQL Server: list of users and roles
SELECT dp.NAME      AS principal_name,
       dp.TYPE_DESC AS principal_type_desc,
       o.NAME       AS object_name,
       p.PERMISSION_NAME,
       p.STATE_DESC AS permission_state_desc
FROM sys.database_permissions p
         LEFT OUTER JOIN sys.all_objects o
                         ON p.MAJOR_ID = o.OBJECT_ID
         INNER JOIN sys.database_principals dp
                    ON p.GRANTEE_PRINCIPAL_ID = dp.PRINCIPAL_ID;