need to truncate the file by setting the database recovery mode to simple.--Modify the transaction log to the simple recovery model, in the simple recovery model, after backing up the database will automatically truncate the log, and in the full recovery model, only after you have backed up the transactions log to truncate the logALTER database name SET RECOVERY simple;--Shrink Truncate log file 1MBDBCC shrinkfile (database name _log, 1);--Modify the transaction log to Full recovery modeALTER d
0. View the database file name and physical file nameSELECT as current_file_location from Sys.master_files1. Run the command UseMaster--Run from MasterALTER DATABASEdbmodifyFILE(Name='DB', filename='C:\NewPath\Database.mdf');ALTER DATABASEdbmodifyFILE(Name='db_LOG', filename='C:\NewPath\Database_log.ldf');ALTER DATABASEDbSETOFFLINE with ROLLBACKIMMEDIATE;2. Move files, check permissions* Move database files (including mdf/ldf) C:\NewPath* Explorer: C:\NewPath, Properties----security--Add locat
Directly on the code:SelectCaseWhen the ' Workreport ' =ltrim (RTRIM (' Workreport ')) then ' trim to space success 'When ' Workreport ' =replace (' workreport ', ' ", ') Then ' REPLACE ' to space success 'When ' Workreport ' =replace (' Workreport ', char (ASCII (REPLACE (' Workreport ', ' workreport ', '))), "then" Use ASCII encoding to replace the space to succeed 'Else ' Go to space failed 'EndThe operating result is:Use ASCII encoding to replace the space to succeedExplanation: The first tw
Label:Original: SQL Server 2012 exception Issue (i)--failover cluster + mirroring environment causes job execution to failFirst of all, thank you. My colleagues first found this issue, thanks: Xiangfei, Zhi-Gang, Hye-youngRecently found a strange problem in the production environment;Environment: WINDOWS 2012+sqlserver
solved how to see LocalDB installed successfully did not? My point is VS2017. SQL Server Object Explorer inside the viewThen right click on SQL Server Add SQL Server Click Browse, expand Locally, wy-59420cc is the computer name,
Use native Microsoft SQL Server Management Studio 2005 clients to connect to the database server times wrong: "This version of the Microsoft SQL Server Management Studio CA n is used to connect to SQL
Look at the SQL Server Big v Song blog post and discover an interesting SQL Server-level summary data issue. The specific questions are as follows: parent_id emp_id emp_name total_amoutNULL 2 Andrew 2002 1 Nancy 1002 3 Janet 1203 4 Michael 801 5 Robert 50Total sales per empl
Message:Unable to start execution of step 3 (Reason:the PowerShell subsystem failed to load [see the SQLAGENT. Out file for details]; The job has been suspended). The step failed.Action:The error indicates the invalid location of SQLPS.exe file. To troubleshoot the issue, please follow the below steps:1. Execute The following statements to check the location of the SQLPS.exe file.SELECT * from Msdb.dbo.syssubsystems wherestart_entry_point = ' Powershe
Tags: style blog http color os file data ioRecently trying to learn ASP. NET MVC, when you click Add-New Item--visual in the data under C # to the ADO Entity Data Model, and the "Select Your data connection" error occurs, the " An error occurred in Microsoft SQL Server Compact 3.5. Please contact the provider vendor to resolve this issue. "and write it down here
Detailed description of SQL Deadlock Detection Methods, detailed description of SQL lock Detection
The deadlock in SQL server refers to the state in which processes are permanently blocked. The following describes how to detect
online transaction processing system, there are two main reasons for the crash. On the one hand, due to the concurrency of multiple users and multi-tasks and the integrity requirements of transactions, when multiple transactions access multiple resources at the same time, if both parties have locked a part of resources but both of them need resources locked by the other party, they will be in an infinite waiting state if they cannot fully obtain the required resources within a limited period of
Let's start with an example of this, which can cause deadlocks in SQL Server 2000 and 2005. In this article, I use the latest CTP (Community Technology Preview, Community Technology Preview) version of SQL Server 2005, and the same applies to SQL
Deadlock in SQL Server refers to a state of permanent blocking between processes, and the following will show you how to detect SQL Server deadlocks in the hope of helping you.
Deadlock (dead
What is a deadlock?
====================
A deadlock occurs when two system server process IDs (SPIDs) are waiting for a resource and neither process can advance because the other process is preventing it from getting the resource. for example, Andrew holds a lock on table A and requests a lock on table B; Lindsay holds a lock on table B and requests a lock on tab
this time, we can use the following stored procedures to detect the process and SQL statements that cause the deadlock. The built-in system stored procedures sp_who and sp_lock of SQL Server can also be used to find blocking and deadlocks, but the method described here is not easy to use.
Use masterGoCreate procedur
Sessions 1 and Session 2 cannot continue until the other party frees resources. Therefore, SQL Server chooses a session in the deadlock as the "deadlock victim."
Note: The deadlock victim's session will be killed and the transaction will be rolled back.
Note: deadlocks and
Record the deadlock process and solution of the company's warehouse database server, and the warehouse database
Four Conditions for deadlock:
Mutual exclusion: resources cannot be shared and can only be used by one process.
Hold and wait: processes that have obtained resources can apply for new resources again.
No pre-emption: allocated resources cannot be forcib
large transaction, the transaction is too large to allow other sessions to wait for exclusive lock time to become longer
2, everyone is using the same nonclustered index, and scan the Pricingexpressproductcode field
3, the index of repeated values are many
From the above symptoms can be basically judged, this nonclustered index is useless, you can disable the
ALTER INDEX [ix_pricingexpressproductcode_state] on [dbo]. [Orderxxx] DISABLE
After disabling, the
('dbcc inputbuffer ('+ @ spid + ')')
If @ sign = 'deadlocked process' exec ('Kill '+ @ spid)
Set @ I = @ I + 1
End
End
Else
While @ I
Begin
Select @ s = 'dbcc inputbuffer ('+ Cast (process ID as varchar) +') 'from # t where id = @ I
Insert # T1 exec (@ s)
Set @ I = @ I + 1
End
Select a. *, the SQL statement of the Process = B. eventinfo
From # t a join # t1 B on A. ID = B. ID
End
Go
Set quoted_identifier off
Go
Set
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