What are the differences between Database Migration Assistant (DMA) and Database Experimentation Assistant (DEA)?

S. No	Data Migration Assistant	Database Experimentation Assistant
1	Data Migration Assistants assists you to migrate the database from lower version to higher version	Database Experimentation Assistant is new experimentation solution for SQL server upgrades.
2	It is used for performing the assessment and migration of SQL server databases.	It captures the profiler trace on the source database (Prod) and replays it on the destination servers (NonProd).
3	Two project types are supported: -          Assessment (Reports on compatibility issues and feature recommendations) -          Migration (It provides the option to migrate the database with logins to target server)	Three options are currently supported: -          Capture a workload on the source server -          Replay the captured workload on target1 and target 2 -          Analyze replayed traces collected from target 1 and target 2
4	Only option is to store the results as (.json or .csv) format	The results can be stored in the database.

Drop Orphan Users On All User databases

Below query will get the information from all the user databases with no mapped logins.

       DECLARE @sql varchar(2000),
               @dbname varchar(64)

       --IF OBJECT_ID('tempdb.dbo.#temp') IS NOT NULL
   CREATE TABLE tempdb.dbo.#temp(
   [Database Name] VARCHAR(30),
   Name VARCHAR(20),
   [Type] VARCHAR(1),
   [Type Description] VARCHAR(20),
   [SID] VARBINARY(85),
   [SID Length] INT
   )
   
       DECLARE orphaned_users CURSOR FOR 
   SELECT d.name
   FROM  sys.databases d
   WHERE d.database_id >4 

       OPEN orphaned_users
       FETCH NEXT FROM orphaned_users INTO @dbname 
       WHILE @@FETCH_STATUS <> -1
       BEGIN

        SELECT @sql ='USE [@dbname]
INSERT INTO tempdb.dbo.#temp  ([Database Name],Name,[Type],[Type Description],[SID],[SID Length])
        SELECT  
DB_NAME() As ''Database Name'',
dp.name AS ''Name'', 
        dp.[type] AS ''Type'',
CASE WHEN dp.[type]=''U'' THEN ''WINDOWS USER''
     WHEN dp.[type]=''S'' THEN ''SQL USER''
WHEN dp.[type]=''C'' THEN ''USER MAPPED TO A CERTIFICATE''
WHEN dp.[type]=''K'' THEN ''USER MAPPED TO AN ASSYMETRIC KEY''
    END AS ''Type Description'',
dp.[sid] AS ''SID'',    
LEN(dp.[sid]) AS [SID Length] 
        FROM sys.database_principals dp
        LEFT JOIN sys.server_principals sp
        ON dp.[sid] = sp.[sid]
        LEFT JOIN sys.certificates c
        ON dp.[sid] = c.[sid]
        LEFT JOIN sys.asymmetric_keys a
        ON dp.[sid] = a.[sid]
        WHERE sp.[sid] is null and c.[sid] is null and a.[sid] is null
        AND dp.[type] in (''U'', ''S'', ''C'', ''K'') 
        AND dp.principal_id > 4 -- 0..4 are system users which will be ignored
        AND NOT (dp.[type] = ''S'' and LEN(dp.[sid]) = 28)'

SELECT @sql = REPLACE(@sql,'@dbname',@dbname)

--PRINT (@sql)
        EXEC  (@sql)

        FETCH NEXT FROM orphaned_users into @dbname
        END
        CLOSE orphaned_users
        DEALLOCATE orphaned_users

    SELECT 'USE '+[Database Name]+CHAR(13)+'DROP USER '+QUOTENAME(Name)+' ;' AS 'Drop                 Orphan Users' FROM #temp

DROP TABLE #temp