2009-12-09

text, ntext ve image veri tipleri

Microsoft, SQL Server'ın yeni çıkacak sürümlerinde text, ntext ve image veri tiplerini kaldıracağını bildiriyor. Bu veri tiplerinin yerine varchar(max), nvarchar(max) ve varbinary(max) veri tiplerini kullanabilirsiniz.

2009-09-03

SQL Server 2005/2008 Registered Server Listesi

SQL Server 2005/2008 de registered server isimlerini aşağıdaki path ve dosyalarda tutuluyor:

SQL Server 2005:
C:\Documents and Settings\\Application Data\Microsoft\Microsoft SQL Server\90\Tools\Shell\RegSrvr.xml

SQL Server 2008:
C:\Documents and Settings\\Application Data\Microsoft\Microsoft SQL Server\100\Tools\Shell\RegSrvr.xml

Bu listeler özellikle benim gibi SQL Server'ınızı tekrardan kurmak zorunda kalmışsanız çok işinize yarayacaktır.

2009-08-30

SQL Server Sistem Collation'ını Değiştirme

Komut satırından aşağıdaki komut yardımıyla SQL Server'ınızın sistem collation'ını değiştirebilirsiniz:

Setup /QUIET /ACTION=REBUILDDATABASE /INSTANCENAME=MSSQLSERVER /SQLSYSADMINACCOUNTS=sa / SAPWD=Passw0rd /SQLCOLLATION=DegistirilecekCollation

Not: master system veritabanı değiştiği için tüm login, yetkiler vs bilgiler uçar(benden uyarması:))!

2009-08-25

SQL Server ile Bilgisayar Adını Bulma

SQL Server üzerinden xp_getnetname sp'ü ile server ismini alabilirsiniz. Bu sp yararlı bir undocumented extended sp olup; aşağıdaki gibi kullanabilirsiniz:

EXEC master.dbo.xp_getnetname

2009-08-19

Disklerdeki Boş Yer Büyüklüğünü Bulma

Server'ınıza bağlı disklerdeki boş yeri SQL Server üzerinden aşağıdaki sp ile bulabilirsiniz:

EXEC master.dbo.xp_fixeddrives

2009-08-16

Undocumented System Views

SQL Server 2005'te dökümante edilmemis sistem view'ları aşağıdaki gibidir:

Base Table Description
sys.sysschobjs : Exists in every database. Each row represents an object in the database.
sys.sysbinobjs : Exists in every database. Contains a row for each Service Broker entity in the database. Service Broker entities include the following:
Message type Service contract
Service The names and types use binary collation that is fixed.

sys.sysclsobjs : Exists in every database. Contains a row for each classified entity that shares the same common properties that include the following:
Assembly
Backup device
Full-text catalog
Partition function
Partition scheme
File group
Obfuscation key

sys.sysnsobjs : Exists in every database. Contains a row for each namespace-scoped entity. This table is used for storing XML collection entities.
sys.syscolpars : Exists in every database. Contains a row for every column in a table, view, or table-valued function. It also contains rows for every parameter of a procedure or function.
sys.systypedsubobjs : Exists in every database. Contains a row for each typed subentity. Currently, only parameters for partition function fall into this category.
sys.sysidxstats : Exists in every database. Contains a row for each index or statistics for tables and indexed views
Note:
Every index (except heap) is associated with a statistic that has the same name as the index.
sys.sysiscols : Exists in every database. Contains a row for each persisted index and statistics column.
sys.sysscalartypes : Exists in every database. Contains a row for each user-defined or system type.
sys.sysdbreg : Exists in the master database only. Contains a row for each registered database.
sys.sysxsrvs : Exists in the master database only. Contains a row for each local, linked, or remote server.
sys.sysrmtlgns : This system base table exists in the master database only. Contains a row for each remote login mapping. This is used to map incoming logins that claim to be coming from a corresponding server to an actual local login.
sys.syslnklgns : Exists in the master database only. Contains a row for each linked login mapping. Linked login mappings are used by remote procedure calls and distributed queries that emanate from a local server out to a corresponding linked server.
sys.sysxlgns : Exists in the master database only. Contains a row for each server principal.
sys.sysdbfiles : Exists in every database. If the column dbid is zero, the row represents a file that belongs to this database. In the master database, the column dbid can be nonzero. When this is the case, the row represents a master file.
sys.sysusermsg : Exists in the master database only. Each row represents a user-defined error message.
sys.sysprivs : Exists in every database. Contains a row for each database- or server-level permission.
Note: Server-level permissions are stored in the master database.
sys.sysowners : Exists in every database. Each row represents a database principal.
sys.sysobjkeycrypts : Exists in every database. Contains a row for each symmetric key, encryption, or cryptographic property associated with an object.
sys.syscerts : Exists in every database. Contains a row for each certificate in a database.
sys.sysasymkeys : Exists in every database. Each row represents an asymmetric key.
sys.ftinds : Exists in every database. Contains a row for each full-text index in the database.
sys.sysxprops : Exists in every database. Contains a row for each extended property.
sys.sysallocunits : Exists in every database. Contains a row for each storage allocation unit.
sys.sysrowsets : Exists in every database. Contains a row for each partition rowset for an index or a heap.
sys.sysrowsetcolumns : Exists in every database. Contains a row for each column, of partition rowset.
sys.syshobts : Exists in every database. Contains a row for each heap or B-tree (HOBT) that can host multiple rowsets
sys.syshobtcolumns : Exists in every database. Contains a row for each column of a HOBT.
sys.sysserefs : Exists in every database. Contains a row for each general storage engine metadata reference.
sys.sysrowsetrefs : Exists in every database. Contains a row for each index to rowset reference.
sys.syslogshippers : Exists in the master database only. Contains a row for each database mirroring witness.
sys.sysremsvcbinds : Exists in every database. Contains a row for each remote service binding.
sys.sysconvgroup : Exists in every database. Contains a row for each service instance in Service Broker.
sys.sysxmitqueue : Exists in every database. Contains a row for each Service Broker transmission queue.
sys.sysdesend : Exists in every database. Contains a row for each sending endpoint of a Service Broker conversation.
sys.sysdercv : Exists in every database. Contains a row for each receiving endpoint of a Service Broker conversation.
sys.sysendpts : Exists in the master database only. Contains a row for each endpoint created in the server.
sys.syswebmethods : Exists in the master database only. Contains a row for each SOAP-method defined on a SOAP-enabled HTTP endpoint that is created in the server.
sys.sysqnames : Exists in every database. Contains a row for each namespace or qualified name to a 4-byte ID token.
sys.sysxmlcomponent : Exists in every database. Each row represents an XML schema component.
sys.sysxmlfacet : Exists in every database. Contains a row for each XML facet (restriction) of XML type definition.
sys.sysxmlplacement : Exists in every database. Contains a row for each XML placement for XML components.
sys.syssingleobjrefs : Exists in every database. Contains a row for each general N-to-1 reference.
sys.sysmultiobjrefs : Exists in every database. Contains a row for each general N-to-N reference.
sys.sysobjvalues : Exists in every database. Contains a row for each general value property of an entity.
sys.sysguidrefs : Exists in every database. Contains a row for each GUID classified ID reference.

2009-08-15

En Son Alınan Backuplar(Last Backups)

SQL Server veritabanlarının en son alınan backupların başlangıç ve bitiş tarih ve saatlerini aşağıdaki SQL kodu ile alabilirsiniz:

SELECT user_name ,
database_name ,
server_name ,
backup_start_date ,
backup_finish_date ,
Type
FROM msdb.dbo.backupset
WHERE backup_set_id IN(SELECT MAX(backup_set_id) FROM msdb.dbo.backupset
WHERE TYPE in ('D','I')
GROUP BY database_name)
AND database_name IN(SELECT name FROM master.dbo.sysdatabases)
ORDER BY database_name

2009-08-05

Regaib Kandiliniz Mübarek Olsun

Regaib kandilinizi tebrik eder; kandilin hayırlara vesile olmasını Cenab-ı Hak'tan niyaz ediyorum.

2009-08-03

DBCC SHOWCONTIG

Tablo ve viewlarda bulunan veri ve indexlere ait fragmantasyonları aşağıdaki kod ile görebilirsiniz:

dbcc showcontig('TabloAdi') with ALL_INDEXES,TABLERESULTS , FAST

2009-07-27

T-SQL Best Practices

  1. select cümlelerinizde muhakkak field isimlerini açık bir şekilde yazın; select * kullanmaktan kaçının
  2. Mecbur kalmadıkça UNION kullanmayın. UNION yerine UNION ALL kullanmak daha performanslıdır.
  3. Yine mecbur kalmadıkça DISTINCT i kullanmayın. Çünkü DISTINCT ın yaptığı sıralama ve çift kayıtları tek e indirmektir.
  4. sp içerisinde tek bir kayıt döndürecekseniz bu kaydı select ile döndürmek yerine OUTPUT parametresi olarak verin.
  5. Zorunlu olmadıkça ORDER BY ifasesinden kaçının

2009-07-23

Login Failedleri Alma

/*
Son bir günde alınan login failed leri aşağıdaki SQL kodları ile alabilirsiniz.
*/

CREATE TABLE #tmploginfailed (
LogDate smallDATETIME,
ProcessInfo NVARCHAR(50),
[Text] NVARCHAR(MAX))
go


insert into #tmploginfailed
EXEC xp_readerrorlog 0,1,'login failed','login failed'

go

select cast(cast(LogDate as varchar(12)) as smalldatetime) as Date ,Text,count(1) as AttemptCount
from #tmploginfailed
where LogDate>=getdate()-1
group by cast(cast(LogDate as varchar(12)) as smalldatetime),text
order by count(1) desc,cast(cast(LogDate as varchar(12)) as smalldatetime)
go

drop table #tmploginfailed
go

.::YASAL UYARI::.

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