File Distribution Drive

 SELECT sf.[name], sf.filename, sd.state_desc, SUBSTRING (sf.filename, 1, 3) AS [drive],
CASE REVERSE(SUBSTRING (REVERSE(filename), 1, 3))
 WHEN 'mdf' THEN 'primary data'
 WHEN 'ndf' THEN 'secondary_data'
 WHEN 'ldf' THEN 'log_file'
 ELSE 'data_file'
END  AS file_type--,  *
FROM sys.sysaltfiles sf
INNER JOIN sys.databases sd
ON sf.dbid = sd.database_id
WHERE sd.state_desc = 'ONLINE'
AND sf.dbid > 4
ORDER BY SUBSTRING (sf.filename, 1, 3)

Fix Orphaned Users

 EXEC sp_change_users_login 'Report'

--Use below code to fix the Orphan User issue
DECLARE @username varchar(25)
DECLARE fixusers CURSOR
FOR
SELECT UserName = name FROM sysusers
WHERE issqluser = 1 and (sid is not null and sid <> 0x0)
and suser_sname(sid) is null
ORDER BY name
OPEN fixusers
FETCH NEXT FROM fixusers
INTO @username
WHILE @@FETCH_STATUS = 0
BEGIN
EXEC sp_change_users_login 'update_one', @username, @username
FETCH NEXT FROM fixusers
INTO @username
END
CLOSE fixusers
DEALLOCATE fixusers

Suspend data transfer for AG databases on the primary node

SELECT sd.[name], ags.role_desc, @@SERVERNAME
FROM sys.dm_hadr_availability_replica_states ags
INNER JOIN sys.databases sd
ON sd.replica_id = ags.replica_id
WHERE ags.[role] = 1


--    BEGIN
--        DECLARE @sql VARCHAR (MAX)
--        SET @sql = 'ALTER DATABASE '+ drs.database_name+' SET HADR SUSPEND'+CHAR (10)+'GO'+CHAR(10)--, ags.name
--        FROM sys.dm_hadr_database_replica_cluster_states drs
--        INNER JOIN sys.dm_hadr_database_replica_states rs
--        ON rs.group_database_id = drs.group_database_id
--        INNER JOIN sys.availability_groups ags
--        ON rs.group_id = ags.group_id
--        WHERE ags.name = 'TWAG'
--        PRINT @sql
--    END
--    ELSE
--        BEGIN
--        SELECT 1/0
--    END


DECLARE @ServerName VARCHAR (20)
SELECT @ServerName = @@SERVERNAME

IF (@ServerName = 'SQLAAG-01')
    BEGIN
        DECLARE @sql VARCHAR (MAX)
        SELECT DISTINCT 'ALTER DATABASE '+ drs.database_name+' SET HADR SUSPEND'+CHAR (10)+'GO'+CHAR(10)--, ags.name
        FROM sys.dm_hadr_database_replica_cluster_states drs
        INNER JOIN sys.dm_hadr_database_replica_states rs
        ON rs.group_database_id = drs.group_database_id
        INNER JOIN sys.availability_groups ags
        ON rs.group_id = ags.group_id
        WHERE ags.name = 'SQLAAG-CLU-AG'
        --PRINT @sql
    END
    ELSE
        BEGIN
        SELECT 1/0
    END

Latest Backup File Location

 SELECT DISTINCT a.database_name, a.max_backup_finish_date, d.compressed_backup_size_in_MBs, d.duration, d.[user_name], d.physical_device_name
FROM
(SELECT
 d.database_name
,MAX(d.backup_finish_date) AS max_backup_finish_date
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset d
ON a.media_set_id = d.media_set_id
WHERE [type] = 'D' --'I for diffs and 'L' for logs
GROUP BY d.[database_name]) a
INNER JOIN
(
SELECT
 d.database_name
,d.backup_finish_date
, (compressed_backup_size/1024/1024) AS compressed_backup_size_in_MBs
, CASE
WHEN DATEDIFF (HOUR, d.backup_start_date, d.backup_finish_date) = 0
THEN CONVERT (VARCHAR (2), DATEDIFF (MINUTE, d.backup_start_date, d.backup_finish_date))+' Minutes'
END AS duration
, [user_name]
, physical_device_name
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset d
ON a.media_set_id = d.media_set_id
WHERE [type] = 'D') d --'I for diffs and 'L' for logs
ON a.database_name = d.database_name
AND a.max_backup_finish_date = d.backup_finish_date

Removing Databases from AG - Script to generate code

 SELECT  'ALTER AVAILABILITY GROUP '+ag.[name]+' REMOVE DATABASE '+sd.[name]+CHAR(10)+'GO'+CHAR(10)
FROM sys.dm_hadr_availability_replica_states ags
INNER JOIN sys.databases sd
ON sd.replica_id = ags.replica_id
INNER JOIN sys.availability_groups ag
ON ags.group_id = ag.group_id
WHERE ags.[role] = 1
AND ag.[name]= 'AG_GP'

Last Backup Time (With Always On Configured)

 SELECT sd.[name]
, sd.state_desc AS database_status
, f.backup_finish_date AS last_full_backup_date
, d.backup_finish_date AS last_diff_backup_date
, CASE WHEN (sd.database_id < 4 OR sd.recovery_model = 3) THEN 'N/A'
ELSE CONVERT (VARCHAR (20), l.backup_finish_date, 120 ) END AS last_log_backup_date
, CASE WHEN (f.backup_finish_date < (DATEADD (DAY, -7, GETDATE())) OR (f.backup_finish_date IS NULL) AND sd.name <> 'TempDB') THEN 'No full backup in the last seven days'
  WHEN (sd.name = 'TempDB') THEN 'N/A'
END AS [missing recent backup]
FROM sys.databases sd
LEFT OUTER JOIN
(SELECT DISTINCT a.*
FROM
(SELECT
d.database_name
,d.backup_finish_date
,(backup_size/1024/1024) AS backup_size_in_MBs
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset d
ON a.media_set_id = d.media_set_id) a
INNER JOIN
(SELECT
 d.database_name
,MAX(d.backup_finish_date) AS max_backup_finish_date
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset d
ON a.media_set_id = d.media_set_id
WHERE [type] = 'D'
AND d.database_name <> 'tempdb'
GROUP BY d.database_name) d
ON a.backup_finish_date = d.max_backup_finish_date
AND a.database_name = d.database_name ) f
ON sd.[name] = f.database_name
LEFT OUTER JOIN
(SELECT DISTINCT a.*
FROM
(SELECT
d.database_name
,d.backup_finish_date
,(backup_size/1024/1024) AS backup_size_in_MBs
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset d
ON a.media_set_id = d.media_set_id) a
INNER JOIN
(SELECT
 d.database_name
,MAX(d.backup_finish_date) AS max_backup_finish_date
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset d
ON a.media_set_id = d.media_set_id
WHERE [type] = 'I'
AND d.database_name <> 'tempdb'
GROUP BY d.database_name) d
ON a.backup_finish_date = d.max_backup_finish_date
AND a.database_name = d.database_name
) d
ON sd.[name] = d.database_name
LEFT OUTER JOIN
(SELECT DISTINCT a.*
FROM
(SELECT
d.database_name
,d.backup_finish_date
,(backup_size/1024/1024) AS backup_size_in_MBs
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset d
ON a.media_set_id = d.media_set_id) a
INNER JOIN
(SELECT
 d.database_name
,MAX(d.backup_finish_date) AS max_backup_finish_date
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset d
ON a.media_set_id = d.media_set_id
WHERE [type] = 'L'
AND d.database_name <> 'tempdb'
GROUP BY d.database_name) d
ON a.backup_finish_date = d.max_backup_finish_date
AND a.database_name = d.database_name
) l
on sd.[name] = l.database_name
INNER JOIN
(SELECT
                        d.[name], hars.role_desc, ag.[name] AS [ag_group_name]--, *
                FROM
                        sys.DATABASES d
                        INNER JOIN sys.dm_hadr_availability_replica_states hars ON d.replica_id = hars.replica_id
                        INNER JOIN sys.availability_groups ag ON ag.group_id = hars.group_id

                        WHERE role_desc = 'PRIMARY'
                        ) ag
ON sd.[name] = ag.[name]

WHERE sd.[name] <> 'tempdb'