Category: SQL Server

  • Steps to Learn Basic SQL

    Problem: I have been often posted with a question that, I want to learn T-SQL and I don’t know any basics of T-SQL.

    Solution:
    To start with the Basic T-SQL and practice, there is very good site W3Schools.com You can learn and practice SQL there.

    http://www.w3schools.com/sql/default.asp

  • What is .TUF file in Log Shipping?

    TUF file is a Microsoft SQL Server Transaction Undo file. .TUF File contains the information regarding any modifications that were made as part of incomplete transactions at the time the backup was performed.

    A transaction undo(.TUF) file is required if a database is loaded in read-only state. In this state, further transaction log backups may be applied.

  • Script to Monitor the progress of ALTER, Backup, Restore, DBCC, Rollback and TDE commands

    We often like to check the progess or completed percentage of time consuming command. You can query the sys.dm_exec_requests DMV to check the status of the command.

    You must have atleast view state permission to execute the below query.
    ALTER INDEX REORGANIZE
    AUTO_SHRINK option with ALTER DATABASE
    BACKUP DATABASE
    DBCC CHECKDB
    DBCC CHECKFILEGROUP
    DBCC CHECKTABLE
    DBCC INDEXDEFRAG
    DBCC SHRINKDATABASE
    DBCC SHRINKFILE
    RECOVERY
    RESTORE DATABASE
    ROLLBACK
    TDE ENCRYPTION

    SELECT dmr.session_id,
       dmr.status,
       dmr.start_time,
       dmr.command,
       dmt.TEXT,
       dmr.percent_complete
FROM sys.dm_exec_requests dmr  CROSS APPLY sys.Dm_exec_sql_text(dmr.sql_handle) dmt WHERE dmr.command IN (‘ALTER’, ‘Backup’, ‘Restore’, ‘DBCC’, ‘Rollback’,  ‘TDE’)

  • How to Check When SQL Server was installed?

    NT AUTHORITY\SYSTEM login gets created when we install SQL Server. By querying sys.syslogins, we would get an idea of the SQL Server Installation date time as per the creation date time of NT AUTHORITY\SYSTEM.

    SELECT createdate AS sql_server_install_date FROM sys.syslogins WHERE sid = 0x010100000000000512000000

    SELECT * FROM sys.syslogins WHERE sid = 0x010100000000000512000000

    SELECT createdate AS sql_server_install_date FROM   sys.syslogins WHERE  sid = 0x010100000000000512000000

SELECT * FROM   sys.syslogins WHERE  sid = 0x010100000000000512000000

  • Script to Update Statistics by passing database name

    You can use below script to update the statistics with the FULL Scan. You can pass the database name in below script, I have given JShah as database name.

    EXEC Sp_msforeachdb
@command1=‘IF ”#” IN (”JShah”) BEGIN PRINT ”#”;
EXEC #.dbo.sp_msForEachTable ”UPDATE STATISTICS ? WITH FULLSCAN”, @command2=”PRINT CONVERT(VARCHAR, GETDATE(), 9) + ”” - ? Stats Updated””” END’
,@replaceChar = ‘#’

    You can use below script to update the statistics with the SAMPLE Percent agrument. You can pass the database name in below script, I have given JShah as database name.

    EXEC Sp_msforeachdb
@command1=‘IF ”#” IN (”JShah”) BEGIN PRINT ”#”;
EXEC #.dbo.sp_msForEachTable ”UPDATE STATISTICS ? WITH SAMPLE 50 PERCENT”, @command2=”PRINT CONVERT(VARCHAR, GETDATE(), 9) + ”” - ? Stats Updated””” END’
,@replaceChar = ‘#’