Category Archives: MSSQL

Clear mssql cache

If you for example need to test a query against two SQL servers hardware, its a good idea to clear the cache first.
This query can do this:

DBCC DROPCLEANBUFFERS; 

-- Removes all elements from the plan cache.

DBCC FREEPROCCACHE;

-- Displays the number of milliseconds required to parse, compile, and execute each statement.

SET STATISTICS TIME ON; 

-- Display information regarding the amount of disk activity generated by Transact-SQL statements.

SET STATISTICS IO ON; 

MSSQL – Always On availability group – Get sync status

If you wan to know the sync status of a always On availability group database replication, this command can be used:

SELECT 
	ar.replica_server_name, 
	adc.database_name, 
	ag.name AS ag_name, 
	drs.is_local, 
	drs.is_primary_replica, 
	drs.synchronization_state_desc, 
	drs.is_commit_participant, 
	drs.synchronization_health_desc, 
	drs.recovery_lsn, 
	drs.truncation_lsn, 
	drs.last_sent_lsn, 
	drs.last_sent_time, 
	drs.last_received_lsn, 
	drs.last_received_time, 
	drs.last_hardened_lsn, 
	drs.last_hardened_time, 
	drs.last_redone_lsn, 
	drs.last_redone_time, 
	drs.log_send_queue_size, 
	drs.log_send_rate, 
	drs.redo_queue_size, 
	drs.redo_rate, 
	drs.filestream_send_rate, 
	drs.end_of_log_lsn, 
	drs.last_commit_lsn, 
	drs.last_commit_time
FROM sys.dm_hadr_database_replica_states AS drs
INNER JOIN sys.availability_databases_cluster AS adc 
	ON drs.group_id = adc.group_id AND 
	drs.group_database_id = adc.group_database_id
INNER JOIN sys.availability_groups AS ag
	ON ag.group_id = drs.group_id
INNER JOIN sys.availability_replicas AS ar 
	ON drs.group_id = ar.group_id AND 
	drs.replica_id = ar.replica_id
ORDER BY 
	ag.name, 
	ar.replica_server_name, 
	adc.database_name;

MSSQL Backup History Query

To see MSSQL history Query, run this SQL query. It will show all backups between the 1 january 2021 and 1 february 2021, order by Database and then Last backup time.

It will also show if the backup is a CopyOnly job.

;WITH CTE_Backup AS
(
SELECT  database_name,is_copy_only,backup_start_date,type,physical_device_name
       ,Row_Number() OVER(PARTITION BY database_name,BS.type
        ORDER BY backup_start_date DESC) AS RowNum
FROM    msdb..backupset BS
JOIN    msdb.dbo.backupmediafamily BMF
ON      BS.media_set_id=BMF.media_set_id
AND		BS.backup_start_date >= '01/01/2021'
AND		BS.backup_start_date <= '02/02/2021'
)
SELECT      D.name
           ,ISNULL(CONVERT(VARCHAR,backup_start_date),'No backups') AS last_backup_time
           ,D.recovery_model_desc
           ,state_desc,
            CASE WHEN type ='D' THEN 'Full database'
            WHEN type ='I' THEN 'Differential database'
            WHEN type ='L' THEN 'Log'
            WHEN type ='F' THEN 'File or filegroup'
            WHEN type ='G' THEN 'Differential file'
            WHEN type ='P' THEN 'Partial'
            WHEN type ='Q' THEN 'Differential partial'
            ELSE 'Unknown' END AS backup_type
           ,physical_device_name,CTE.is_copy_only
FROM        sys.databases D
LEFT JOIN   CTE_Backup CTE
ON          D.name = CTE.database_name

ORDER BY    D.name,last_backup_time

MSSQL database roles get all securables – Full script out the Database Roles

/********************************************************************
 *                                                                  *
 * Author: John Eisbrener                                           *
 * Script Purpose: Script out Database Role Definition              *
 * Notes: Please report any bugs to http://www.dbaeyes.com/         *
 *                                                                  *
 * Update: 2014-03-03 - Adjusted output to accommodate Role         *
 *                      definitions that are longer than 8000 chars *
 * Update: 2013-09-03 - Added user output per Joe Spivey's comment  *
 *                    - Modified formatting for oddly named objects *
 *                    - Included support for Grants on DMVs         *
 ********************************************************************/
DECLARE @roleName VARCHAR(255)
SET @roleName = 'DatabaseRoleName'

-- Script out the Role
DECLARE @roleDesc VARCHAR(MAX), @crlf VARCHAR(2)
SET @crlf = CHAR(13) + CHAR(10)
SET @roleDesc = 'CREATE ROLE [' + @roleName + ']' + @crlf + 'GO' + @crlf + @crlf

SELECT    @roleDesc = @roleDesc +
        CASE dp.state
            WHEN 'D' THEN 'DENY '
            WHEN 'G' THEN 'GRANT '
            WHEN 'R' THEN 'REVOKE '
            WHEN 'W' THEN 'GRANT '
        END + 
        dp.permission_name + ' ' +
        CASE dp.class
            WHEN 0 THEN ''
            WHEN 1 THEN --table or column subset on the table
                CASE WHEN dp.major_id < 0 THEN
                    + 'ON [sys].[' + OBJECT_NAME(dp.major_id) + '] '
                ELSE
                    + 'ON [' +
                    (SELECT SCHEMA_NAME(schema_id) + '].[' + name FROM sys.objects WHERE object_id = dp.major_id)
                        + -- optionally concatenate column names
                    CASE WHEN MAX(dp.minor_id) > 0 
                         THEN '] ([' + REPLACE(
                                        (SELECT name + '], [' 
                                         FROM sys.columns 
                                         WHERE object_id = dp.major_id 
                                            AND column_id IN (SELECT minor_id 
                                                              FROM sys.database_permissions 
                                                              WHERE major_id = dp.major_id
                                                                AND USER_NAME(grantee_principal_id) IN (@roleName)
                                                             )
                                         FOR XML PATH('')
                                        ) --replace final square bracket pair
                                    + '])', ', []', '')
                         ELSE ']'
                    END + ' '
                END
            WHEN 3 THEN 'ON SCHEMA::[' + SCHEMA_NAME(dp.major_id) + '] '
            WHEN 4 THEN 'ON ' + (SELECT RIGHT(type_desc, 4) + '::[' + name FROM sys.database_principals WHERE principal_id = dp.major_id) + '] '
            WHEN 5 THEN 'ON ASSEMBLY::[' + (SELECT name FROM sys.assemblies WHERE assembly_id = dp.major_id) + '] '
            WHEN 6 THEN 'ON TYPE::[' + (SELECT name FROM sys.types WHERE user_type_id = dp.major_id) + '] '
            WHEN 10 THEN 'ON XML SCHEMA COLLECTION::[' + (SELECT SCHEMA_NAME(schema_id) + '.' + name FROM sys.xml_schema_collections WHERE xml_collection_id = dp.major_id) + '] '
            WHEN 15 THEN 'ON MESSAGE TYPE::[' + (SELECT name FROM sys.service_message_types WHERE message_type_id = dp.major_id) + '] '
            WHEN 16 THEN 'ON CONTRACT::[' + (SELECT name FROM sys.service_contracts WHERE service_contract_id = dp.major_id) + '] '
            WHEN 17 THEN 'ON SERVICE::[' + (SELECT name FROM sys.services WHERE service_id = dp.major_id) + '] '
            WHEN 18 THEN 'ON REMOTE SERVICE BINDING::[' + (SELECT name FROM sys.remote_service_bindings WHERE remote_service_binding_id = dp.major_id) + '] '
            WHEN 19 THEN 'ON ROUTE::[' + (SELECT name FROM sys.routes WHERE route_id = dp.major_id) + '] '
            WHEN 23 THEN 'ON FULLTEXT CATALOG::[' + (SELECT name FROM sys.fulltext_catalogs WHERE fulltext_catalog_id = dp.major_id) + '] '
            WHEN 24 THEN 'ON SYMMETRIC KEY::[' + (SELECT name FROM sys.symmetric_keys WHERE symmetric_key_id = dp.major_id) + '] '
            WHEN 25 THEN 'ON CERTIFICATE::[' + (SELECT name FROM sys.certificates WHERE certificate_id = dp.major_id) + '] '
            WHEN 26 THEN 'ON ASYMMETRIC KEY::[' + (SELECT name FROM sys.asymmetric_keys WHERE asymmetric_key_id = dp.major_id) + '] '
         END COLLATE SQL_Latin1_General_CP1_CI_AS
         + 'TO [' + @roleName + ']' + 
         CASE dp.state WHEN 'W' THEN ' WITH GRANT OPTION' ELSE '' END + @crlf
FROM    sys.database_permissions dp
WHERE    USER_NAME(dp.grantee_principal_id) IN (@roleName)
GROUP BY dp.state, dp.major_id, dp.permission_name, dp.class

SELECT @roleDesc = @roleDesc + 'GO' + @crlf + @crlf

-- Display users within Role.  Code stubbed by Joe Spivey
SELECT	@roleDesc = @roleDesc + 'EXECUTE sp_AddRoleMember ''' + roles.name + ''', ''' + users.name + '''' + @crlf
FROM	sys.database_principals users
		INNER JOIN sys.database_role_members link 
			ON link.member_principal_id = users.principal_id
		INNER JOIN sys.database_principals roles 
			ON roles.principal_id = link.role_principal_id
WHERE	roles.name = @roleName

-- PRINT out in blocks of up to 8000 based on last \r\n
DECLARE @printCur INT
SET @printCur = 8000

WHILE LEN(@roleDesc) > 8000
BEGIN
    -- Reverse first 8000 characters and look for first lf cr (reversed crlf) as delimiter
    SET @printCur = 8000 - CHARINDEX(CHAR(10) + CHAR(13), REVERSE(SUBSTRING(@roleDesc, 0, 8000)))

    PRINT LEFT(@roleDesc, @printCur)
    SELECT @roleDesc = RIGHT(@roleDesc, LEN(@roleDesc) - @printCur)
END

PRINT @roleDesc + 'GO'

Thanks for the script to John Eisbrener – Check for new version here: https://dbaeyes.wordpress.com/2013/04/19/fully-script-out-a-mssql-database-role/

MSSQL – check that the Agent Job have been run as Schedule

I have this problems, that if a schedule inside a Agent job, have not been started for some reason, there will be no errors about this problem.

So Í have created this script, that will give the Status of 1, if the job, haven’t been run for the last two hours.
I used PRTG to check the status.

USE msdb
GO

DECLARE @JobName VARCHAR(1000)
DECLARE @LastRunTime VARCHAR(1000)
DECLARE @LastRunStatus VARCHAR(1000)
DECLARE @CurrentTime VARCHAR(20)

SET @JobName = 'JOBNAME'

SET @CurrentTime = LEFT(REPLACE(CONVERT (time, DATEADD(HOUR, - 2, GETDATE())),':',''),6)

SELECT DISTINCT @LastRunTime = SJH.run_time
FROM sysjobhistory SJH, sysjobs SJ
WHERE SJ.[name] = @JobName AND SJH.job_id = SJ.job_id and SJH.run_date = 
(SELECT MAX(SJH1.run_date) FROM sysjobhistory SJH1 WHERE SJH.job_id = SJH1.job_id)

IF @LastRunTime >= @CurrentTime
	SELECT '0' AS Status
 ELSE
	SELECT '1' AS Status

In line 10, replace – 2 with the number of hours, you want to go back

Below is the same script, just for daily jobs, so it will will check if the job haven’t been run in the last 25 hours (My Schedule is set to run every 24 hours, and i give it an hour to be finish, before i got an alarm.

DECLARE @JobName VARCHAR(1000)
DECLARE @LastRunDate VARCHAR(1000)
DECLARE @LastRunStatus VARCHAR(1000)
DECLARE @CurrentDate VARCHAR(20) -- used for file name

SET @JobName = 'JOBNAME'

SET @CurrentDate = REPLACE(CONVERT (date, DATEADD(HOUR, -25, GETDATE())),'-','') 

SELECT DISTINCT @LastRunDate = SJH.run_date
FROM sysjobhistory SJH, sysjobs SJ
WHERE SJ.[name] = 'Fibia optimering daglig (Batch 2)' AND SJH.job_id = SJ.job_id and SJH.run_date = 
(SELECT MAX(SJH1.run_date) FROM sysjobhistory SJH1 WHERE SJH.job_id = SJH1.job_id)
ORDER BY SJH.run_date desc

IF @LastRunDate >= @CurrentDate
	SELECT '0' as Status
 ELSE
 	SELECT '1' as Status

In line 10, replace – 25 with the number of hours, you want to go back

Implement SQL Server Agent Jobs with AlwaysOn Availability Groups

The function I use fn_hadr_group_is_primary from this post is a UDF (User Defined Function) that we create in the master database. The function gets an Availability Group name as an input parameter and returns a Boolean value indicating weather this instance is a primary replica.

-- fn_hadr_group_is_primary
USE master;
GO
IF OBJECT_ID('dbo.fn_hadr_group_is_primary', 'FN') IS NOT NULL
  DROP FUNCTION dbo.fn_hadr_group_is_primary;
GO
CREATE FUNCTION dbo.fn_hadr_group_is_primary (@AGName sysname)
RETURNS bit
AS
BEGIN;
  DECLARE @PrimaryReplica sysname; 

  SELECT
    @PrimaryReplica = hags.primary_replica
  FROM sys.dm_hadr_availability_group_states hags
  INNER JOIN sys.availability_groups ag ON ag.group_id = hags.group_id
  WHERE ag.name = @AGName;

  IF UPPER(@PrimaryReplica) =  UPPER(@@SERVERNAME)
    RETURN 1; -- primary

    RETURN 0; -- not primary
END; 

Use the fn_hadr_group_is_primary function within a new job step to find if this sql instance is a Primary replica. If this is not a primary replica we issue a stop job request while identifying the current job name using SQL Server Agent Tokens

-- Detect if this instance's role is a Primary Replica.
-- If this instance's role is NOT a Primary Replica stop the job so that it does not go on to the next job step
DECLARE @rc int; 
EXEC @rc = master.dbo.fn_hadr_group_is_primary N'my-ag';

IF @rc = 0
BEGIN;
    DECLARE @name sysname;
    SELECT  @name = (SELECT name FROM msdb.dbo.sysjobs WHERE job_id = CONVERT(uniqueidentifier, '$(ESCAPE_NONE(JOBID))'));
    
    EXEC msdb.dbo.sp_stop_job @job_name = @name;
    PRINT 'Stopped the job since this is not a Primary Replica';
END;

mssql get the backup information with copy_only information.

I need to find a way to see if the backup chain where broken. On my search I found this could script, created by “hot2use”
I have found this script on a forum.
https://dba.stackexchange.com/questions/204883/how-to-tell-if-a-backup-log-chain-is-broken

The script is very cool, as it will tell you the backup information, from a database. All you need to do is change this ‘<DATABASENAME>’ to yours database name, example ‘MASTER’.
It will also include if a job where COPY ONLY, and where the backup is save.

You can see in the screenshot below, that someone have run a full backup and save it on the D:\ drive, but it where a copy only so the backup is not broken.

/* ==================================================================
 Author......:  hot2use 
 Date........:  25.04.2018
 Version.....:  0.1
 Server......:  localhost (first created for)
 Database....:  msdb
 Owner.......:  -
 Table.......:  various
 Type........:  Script
 Name........:  ADMIN_Retrieve_Backup_History_Information.sql
 Description.:  Retrieve backup history information from msdb database
 ............   
 ............   
 ............       
 History.....:   0.1    h2u First created
 ............       
 ............       
================================================================== */
SELECT /* Columns for retrieving information */
       -- CONVERT(CHAR(100), SERVERPROPERTY('Servername')) AS SRVNAME, 
       msdb.dbo.backupset.database_name,
       msdb.dbo.backupset.backup_start_date,
       msdb.dbo.backupset.backup_finish_date,
       -- msdb.dbo.backupset.expiration_date, 

       CASE msdb.dbo.backupset.type
            WHEN 'D' THEN 'Full'
            WHEN 'I' THEN 'Diff'
            WHEN 'L' THEN 'Log'
       END  AS backup_type,
       -- msdb.dbo.backupset.backup_size / 1024 / 1024 as [backup_size MB],  
       msdb.dbo.backupmediafamily.logical_device_name,
       msdb.dbo.backupmediafamily.physical_device_name,
       -- msdb.dbo.backupset.name AS backupset_name,
       -- msdb.dbo.backupset.description,
       msdb.dbo.backupset.is_copy_only,
       msdb.dbo.backupset.is_snapshot,
       msdb.dbo.backupset.checkpoint_lsn,
       msdb.dbo.backupset.database_backup_lsn,
       msdb.dbo.backupset.differential_base_lsn,
       msdb.dbo.backupset.first_lsn,
       msdb.dbo.backupset.fork_point_lsn,
       msdb.dbo.backupset.last_lsn
FROM   msdb.dbo.backupmediafamily
       INNER JOIN msdb.dbo.backupset
            ON  msdb.dbo.backupmediafamily.media_set_id = msdb.dbo.backupset.media_set_id 

        /* ----------------------------------------------------------------------------
        Generic WHERE statement to simplify selection of more WHEREs    
        -------------------------------------------------------------------------------*/
WHERE  1 = 1

       /* ----------------------------------------------------------------------------
       WHERE statement to find Device Backups with '{' and date n days back
       ------------------------------------------------------------------------------- */
       -- AND     physical_device_name LIKE '{%'

       /* -------------------------------------------------------------------------------
       WHERE statement to find Backups saved in standard directories, msdb.dbo.backupfile AS b 
       ---------------------------------------------------------------------------------- */
       -- AND     physical_device_name  LIKE '[fF]:%'                          -- STANDARD F: Backup Directory
       -- AND     physical_device_name  NOT LIKE '[nN]:%'                      -- STANDARD N: Backup Directory

       -- AND     physical_device_name  NOT LIKE '{%'                          -- Outstanding Analysis
       -- AND     physical_device_name  NOT LIKE '%$\Sharepoint$\%' ESCAPE '$' -- Sharepoint Backs up to Share
       -- AND     backupset_name NOT LIKE '%Galaxy%'                           -- CommVault Sympana Backup


       /* -------------------------------------------------------------------------------
       WHERE Statement to find backup information for a certain period of time, msdb.dbo.backupset AS b 
       ---------------------------------------------------------------------------------- 
       AND    (CONVERT(datetime, msdb.dbo.backupset.backup_start_date, 102) >= GETDATE() - 7)  -- 7 days old or younger
       AND    (CONVERT(datetime, msdb.dbo.backupset.backup_start_date, 102) <= GETDATE())  -- n days old or older

       */

       /* -------------------------------------------------------------------------------
       WHERE Statement to find backup information for (a) given database(s) 
       ---------------------------------------------------------------------------------- */
       AND database_name IN ('<DATABASENAME>') -- database names
       -- AND     database_name IN ('rtc')  -- database names

        /* -------------------------------------------------------------------------------
        ORDER Clause for other statements
        ---------------------------------------------------------------------------------- */
        --ORDER BY        msdb.dbo.backupset.database_name, msdb.dbo.backupset.backup_finish_date -- order clause

        ---WHERE msdb..backupset.type = 'I' OR  msdb..backupset.type = 'D'
ORDER BY
       --2,

       2       DESC,
       3       DESC 

Monitoring a Automatic Seeding in msSQL Always on Availability Groups

This command, can be run on both the primary and secondary node.

SELECT local_database_name
 ,role_desc
 ,internal_state_desc
 ,transfer_rate_bytes_per_second
 ,transferred_size_bytes
 ,database_size_bytes
 ,start_time_utc
 ,end_time_utc
 ,estimate_time_complete_utc
 ,total_disk_io_wait_time_ms
 ,total_network_wait_time_ms
 ,is_compression_enabled
FROM sys.dm_hadr_physical_seeding_stats