Insert a Comma Separator Between ResultSet of a SQL Table Column

Consider we have a table dbo.User, and we need to get all UserIDs separated by comma the apply below script:

Example:

Select Top 5 UserID From dbo.User

gives output as below

UserID
1
2
3
4
5

DECLARE @UserID VARCHAR(MAX)

SELECT @USERID = COALESCE(@USERID+',' , '') + UserID
FROM dbo.User
SELECT @USERID

This yields output as 1,2,3,4,5,....

T-SQL Script to Rebuild Indexes in a Database

T-SQL Script to rebuild indexes in a database:

SET nocount ON;

DECLARE @objectid INT;
DECLARE @indexid INT;
DECLARE @partitioncount BIGINT;
DECLARE @schemaname NVARCHAR(130);
DECLARE @objectname NVARCHAR(130);
DECLARE @indexname NVARCHAR(130);
DECLARE @partitionnum BIGINT;
DECLARE @partitions BIGINT;
DECLARE @frag FLOAT;
DECLARE @command NVARCHAR(4000);
DECLARE @dbid SMALLINT;

-- Conditionally select tables and indexes from the sys.dm_db_index_physical_stats function
-- and convert object and index IDs to names.
SET @dbid = Db_id();

SELECT [object_id]                  AS objectid,
       index_id                     AS indexid,
       partition_number             AS partitionnum,
       avg_fragmentation_in_percent AS frag,
       page_count
INTO   #work_to_do
FROM   sys.Dm_db_index_physical_stats (@dbid, NULL, NULL, NULL, N'LIMITED')
WHERE  avg_fragmentation_in_percent > 10.0 -- Allow limited fragmentation
       AND index_id > 0 -- Ignore heaps
       AND page_count > 25; -- Ignore small tables

-- Declare the cursor for the list of partitions to be processed.
DECLARE partitions CURSOR FOR
  SELECT objectid,
         indexid,
         partitionnum,
         frag
  FROM   #work_to_do;

-- Open the cursor.
OPEN partitions;

-- Loop through the partitions.
WHILE ( 1 = 1 )
  BEGIN
      FETCH next FROM partitions INTO @objectid, @indexid, @partitionnum, @frag;

      IF @@FETCH_STATUS < 0
        BREAK;

      SELECT @objectname = Quotename(o.name),
             @schemaname = Quotename(s.name)
      FROM   sys.objects AS o
             JOIN sys.schemas AS s
               ON s.schema_id = o.schema_id
      WHERE  o.object_id = @objectid;

      SELECT @indexname = Quotename(name)
      FROM   sys.indexes
      WHERE  object_id = @objectid
             AND index_id = @indexid;

      SELECT @partitioncount = Count (*)
      FROM   sys.partitions
      WHERE  object_id = @objectid
             AND index_id = @indexid;

      -- 30 is an arbitrary decision point at which to switch between reorganizing and rebuilding.
      IF @frag < 30.0          SET @command = N'ALTER INDEX ' + @indexname + N' ON '                         + @schemaname + N'.' + @objectname + N' REORGANIZE';        IF @frag >= 30.0
        SET @command = N'ALTER INDEX ' + @indexname + N' ON '
                       + @schemaname + N'.' + @objectname + N' REBUILD';

      IF @partitioncount > 1
        SET @command = @command + N' PARTITION='
                       + Cast(@partitionnum AS NVARCHAR(10));

      EXEC (@command);

      PRINT N'Executed: ' + @command;
  END

-- Close and deallocate the cursor.
CLOSE partitions;

DEALLOCATE partitions;

-- Drop the temporary table.
DROP TABLE #work_to_do;

go

Using T-SQL Equal 'LIKE' Operator in SSRS

I was preparing a SSRS report to get count of users title starts with 'QA'  (example QA Lead, QA Analyst, etc) in my report, and atlast found the solution

=SUM(IIF(Fields!UserTitle.Value LIKE "QA*", 1, 0))

T-SQL to identify long running queries

Below queries helps to identify long running query and hanging queries:

USE MASTER
GO
SELECT SPID,ER.percent_complete,
/* This piece of code has been taken from article. Nice code to get time criteria's
http://beyondrelational.com/blogs/geniiius/archive/2011/11/01/backup-restore-checkdb-shrinkfile-progress.aspx
*/
    CAST(((DATEDIFF(s,start_time,GetDate()))/3600) as varchar) + ' hour(s), '
        + CAST((DATEDIFF(s,start_time,GetDate())%3600)/60 as varchar) + 'min, '
        + CAST((DATEDIFF(s,start_time,GetDate())%60) as varchar) + ' sec' as running_time,
    CAST((estimated_completion_time/3600000) as varchar) + ' hour(s), '
        + CAST((estimated_completion_time %3600000)/60000 as varchar) + 'min, '
        + CAST((estimated_completion_time %60000)/1000 as varchar) + ' sec' as est_time_to_go,
    DATEADD(second,estimated_completion_time/1000, getdate()) as est_completion_time,
/* End of Article Code */    
ER.command,ER.blocking_session_id, SP.DBID,LASTWAITTYPE,
DB_NAME(SP.DBID) AS DBNAME,
SUBSTRING(est.text, (ER.statement_start_offset/2)+1,
        ((CASE ER.statement_end_offset
         WHEN -1 THEN DATALENGTH(est.text)
         ELSE ER.statement_end_offset
         END - ER.statement_start_offset)/2) + 1) AS QueryText,
TEXT,CPU,HOSTNAME,LOGIN_TIME,LOGINAME,
SP.status,PROGRAM_NAME,NT_DOMAIN, NT_USERNAME
FROM SYSPROCESSES SP
INNER JOIN sys.dm_exec_requests ER
ON sp.spid = ER.session_id
CROSS APPLY SYS.DM_EXEC_SQL_TEXT(er.sql_handle) EST
ORDER BY CPU DESC     

Restore MDF file to New Database

Execute below script to restore any MDF and LDF files to new Database.

USE [master]

GO

CREATE DATABASE DemoDB ON

( FILENAME = N'I:\MSSQL\DATA\DemoDB.mdf' ),

( FILENAME = N'K:\MSSQL\Logs\DemoDB_log.ldf' )

FOR ATTACH ;

GO

SQL to Shrink LogFile after Truncating Records

Below SQL helps you to shrink a DB grown due to truncating of records from tables regularly:

USE DemoDB;

DBCC SHRINKFILE ('DemoDB_log',0,truncateonly)

SSAS Error: No Mapping between Account Names and Security IDs was Done

We may come across the below error mostly while we are deploying SSAS cube in to one server:

It is because of difference in domain between development server and deployment server. In that cases Goto Roles --> Membership tab, and remove non-supportive members from the role.